dnl Copyright (c) 1995, 1996, 1997, 1998 dnl The Regents of the University of California. All rights reserved. dnl dnl Redistribution and use in source and binary forms, with or without dnl modification, are permitted provided that: (1) source code distributions dnl retain the above copyright notice and this paragraph in its entirety, (2) dnl distributions including binary code include the above copyright notice and dnl this paragraph in its entirety in the documentation or other materials dnl provided with the distribution, and (3) all advertising materials mentioning dnl features or use of this software display the following acknowledgement: dnl ``This product includes software developed by the University of California, dnl Lawrence Berkeley Laboratory and its contributors.'' Neither the name of dnl the University nor the names of its contributors may be used to endorse dnl or promote products derived from this software without specific prior dnl written permission. dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED dnl WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. dnl dnl LBL autoconf macros dnl dnl dnl Do whatever AC_LBL_C_INIT work is necessary before using AC_PROG_CC. dnl dnl It appears that newer versions of autoconf (2.64 and later) will, dnl if you use AC_TRY_COMPILE in a macro, stick AC_PROG_CC at the dnl beginning of the macro, even if the macro itself calls AC_PROG_CC. dnl See the "Prerequisite Macros" and "Expanded Before Required" sections dnl in the Autoconf documentation. dnl dnl This causes a steaming heap of fail in our case, as we were, in dnl AC_LBL_C_INIT, doing the tests we now do in AC_LBL_C_INIT_BEFORE_CC, dnl calling AC_PROG_CC, and then doing the tests we now do in dnl AC_LBL_C_INIT. Now, we run AC_LBL_C_INIT_BEFORE_CC, AC_PROG_CC, dnl and AC_LBL_C_INIT at the top level. dnl AC_DEFUN(AC_LBL_C_INIT_BEFORE_CC, [ AC_BEFORE([$0], [AC_LBL_C_INIT]) AC_BEFORE([$0], [AC_PROG_CC]) AC_BEFORE([$0], [AC_LBL_FIXINCLUDES]) AC_BEFORE([$0], [AC_LBL_DEVEL]) AC_ARG_WITH(gcc, [ --without-gcc don't use gcc]) $1="" if test "${srcdir}" != "." ; then $1="-I\$(srcdir)" fi if test "${CFLAGS+set}" = set; then LBL_CFLAGS="$CFLAGS" fi if test -z "$CC" ; then case "$host_os" in bsdi*) AC_CHECK_PROG(SHLICC2, shlicc2, yes, no) if test $SHLICC2 = yes ; then CC=shlicc2 export CC fi ;; esac fi if test -z "$CC" -a "$with_gcc" = no ; then CC=cc export CC fi ]) dnl dnl Determine which compiler we're using (cc or gcc) dnl If using gcc, determine the version number dnl If using cc: dnl require that it support ansi prototypes dnl use -O (AC_PROG_CC will use -g -O2 on gcc, so we don't need to dnl do that ourselves for gcc) dnl add -g flags, as appropriate dnl explicitly specify /usr/local/include dnl dnl NOTE WELL: with newer versions of autoconf, "gcc" means any compiler dnl that defines __GNUC__, which means clang, for example, counts as "gcc". dnl dnl usage: dnl dnl AC_LBL_C_INIT(copt, incls) dnl dnl results: dnl dnl $1 (copt set) dnl $2 (incls set) dnl CC dnl LDFLAGS dnl LBL_CFLAGS dnl AC_DEFUN(AC_LBL_C_INIT, [ AC_BEFORE([$0], [AC_LBL_FIXINCLUDES]) AC_BEFORE([$0], [AC_LBL_DEVEL]) AC_BEFORE([$0], [AC_LBL_SHLIBS_INIT]) if test "$GCC" = yes ; then # # -Werror forces warnings to be errors. # ac_lbl_cc_force_warning_errors=-Werror # # Try to have the compiler default to hiding symbols, # so that only symbols explicitly exported with # PCAP_API will be visible outside (shared) libraries. # AC_LBL_CHECK_COMPILER_OPT($1, -fvisibility=hidden) else $2="$$2 -I/usr/local/include" LDFLAGS="$LDFLAGS -L/usr/local/lib" case "$host_os" in darwin*) # # This is assumed either to be GCC or clang, both # of which use -Werror to force warnings to be errors. # ac_lbl_cc_force_warning_errors=-Werror # # Try to have the compiler default to hiding symbols, # so that only symbols explicitly exported with # PCAP_API will be visible outside (shared) libraries. # AC_LBL_CHECK_COMPILER_OPT($1, -fvisibility=hidden) ;; hpux*) # # HP C, which is what we presume we're using, doesn't # exit with a non-zero exit status if we hand it an # invalid -W flag, can't be forced to do so even with # +We, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes ;; irix*) # # MIPS C, which is what we presume we're using, doesn't # necessarily exit with a non-zero exit status if we # hand it an invalid -W flag, can't be forced to do # so, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes # # It also, apparently, defaults to "char" being # unsigned, unlike most other C implementations; # I suppose we could say "signed char" whenever # we want to guarantee a signed "char", but let's # just force signed chars. # # -xansi is normally the default, but the # configure script was setting it; perhaps -cckr # was the default in the Old Days. (Then again, # that would probably be for backwards compatibility # in the days when ANSI C was Shiny and New, i.e. # 1989 and the early '90's, so maybe we can just # drop support for those compilers.) # # -g is equivalent to -g2, which turns off # optimization; we choose -g3, which generates # debugging information but doesn't turn off # optimization (even if the optimization would # cause inaccuracies in debugging). # $1="$$1 -xansi -signed -g3" ;; osf*) # # Presumed to be DEC OSF/1, Digital UNIX, or # Tru64 UNIX. # # The DEC C compiler, which is what we presume we're # using, doesn't exit with a non-zero exit status if we # hand it an invalid -W flag, can't be forced to do # so, and doesn't handle GCC-style -W flags, so we # don't want to try using GCC-style -W flags. # ac_lbl_cc_dont_try_gcc_dashW=yes # # -g is equivalent to -g2, which turns off # optimization; we choose -g3, which generates # debugging information but doesn't turn off # optimization (even if the optimization would # cause inaccuracies in debugging). # $1="$$1 -g3" ;; solaris*) # # Assumed to be Sun C, which requires -errwarn to force # warnings to be treated as errors. # ac_lbl_cc_force_warning_errors=-errwarn # # Try to have the compiler default to hiding symbols, # so that only symbols explicitly exported with # PCAP_API will be visible outside (shared) libraries. # AC_LBL_CHECK_COMPILER_OPT($1, -xldscope=hidden) ;; ultrix*) AC_MSG_CHECKING(that Ultrix $CC hacks const in prototypes) AC_CACHE_VAL(ac_cv_lbl_cc_const_proto, AC_TRY_COMPILE( [#include ], [struct a { int b; }; void c(const struct a *)], ac_cv_lbl_cc_const_proto=yes, ac_cv_lbl_cc_const_proto=no)) AC_MSG_RESULT($ac_cv_lbl_cc_const_proto) if test $ac_cv_lbl_cc_const_proto = no ; then AC_DEFINE(const,[], [to handle Ultrix compilers that don't support const in prototypes]) fi ;; esac $1="$$1 -O" fi ]) dnl dnl Save the values of various variables that affect compilation and dnl linking, and that we don't ourselves modify persistently; done dnl before a test involving compiling or linking is done, so that we dnl can restore those variables after the test is done. dnl AC_DEFUN(AC_LBL_SAVE_CHECK_STATE, [ save_CFLAGS="$CFLAGS" save_LIBS="$LIBS" save_LDFLAGS="$LDFLAGS" ]) dnl dnl Restore the values of variables saved by AC_LBL_SAVE_CHECK_STATE. dnl AC_DEFUN(AC_LBL_RESTORE_CHECK_STATE, [ CFLAGS="$save_CFLAGS" LIBS="$save_LIBS" LDFLAGS="$save_LDFLAGS" ]) dnl dnl Check whether the compiler option specified as the second argument dnl is supported by the compiler and, if so, add it to the macro dnl specified as the first argument dnl dnl If a third argument is supplied, treat it as C code to be compiled dnl with the flag in question, and the "treat warnings as errors" flag dnl set, and don't add the flag to the first argument if the compile dnl fails; this is for warning options cause problems that can't be dnl worked around. If a third argument is supplied, a fourth argument dnl should also be supplied; it's a message describing what the test dnl program is checking. dnl AC_DEFUN(AC_LBL_CHECK_COMPILER_OPT, [ AC_MSG_CHECKING([whether the compiler supports the $2 option]) save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $2" # # XXX - yes, this depends on the way AC_LANG_WERROR works, # but no mechanism is provided to turn AC_LANG_WERROR on # *and then turn it back off*, so that we *only* do it when # testing compiler options - 15 years after somebody asked # for it: # # https://autoconf.gnu.narkive.com/gTAVmfKD/how-to-cancel-flags-set-by-ac-lang-werror # save_ac_c_werror_flag="$ac_c_werror_flag" ac_c_werror_flag=yes # # We use AC_LANG_SOURCE() so that we can control the complete # content of the program being compiled. We do not, for example, # want the default "int main()" that AC_LANG_PROGRAM() generates, # as it will generate a warning with -Wold-style-definition, meaning # that we would treat it as not working, as the test will fail if # *any* error output, including a warning due to the flag we're # testing, is generated; see # # https://www.postgresql.org/message-id/2192993.1591682589%40sss.pgh.pa.us # https://www.postgresql.org/message-id/2192993.1591682589%40sss.pgh.pa.us # # This may, as per those two messages, be fixed in autoconf 2.70, # but we only require 2.64 or newer for now. # AC_COMPILE_IFELSE( [AC_LANG_SOURCE([[int main(void) { return 0; }]])], [ AC_MSG_RESULT([yes]) can_add_to_cflags=yes # # The compile supports this; do we have some C code for # which the warning should *not* appear? # We test the fourth argument because the third argument # could contain quotes, breaking the test. # if test "x$4" != "x" then CFLAGS="$CFLAGS $ac_lbl_cc_force_warning_errors" AC_MSG_CHECKING(whether $2 $4) AC_COMPILE_IFELSE( [AC_LANG_SOURCE($3)], [ # # Not a problem. # AC_MSG_RESULT(no) ], [ # # A problem. # AC_MSG_RESULT(yes) can_add_to_cflags=no ]) fi CFLAGS="$save_CFLAGS" if test x"$can_add_to_cflags" = "xyes" then $1="$$1 $2" fi ], [ AC_MSG_RESULT([no]) CFLAGS="$save_CFLAGS" ]) ac_c_werror_flag="$save_ac_c_werror_flag" ]) dnl dnl Check whether the compiler supports an option to generate dnl Makefile-style dependency lines dnl dnl GCC uses -M for this. Non-GCC compilers that support this dnl use a variety of flags, including but not limited to -M. dnl dnl We test whether the flag in question is supported, as older dnl versions of compilers might not support it. dnl dnl We don't try all the possible flags, just in case some flag means dnl "generate dependencies" on one compiler but means something else dnl on another compiler. dnl dnl Most compilers that support this send the output to the standard dnl output by default. IBM's XLC, however, supports -M but sends dnl the output to {sourcefile-basename}.u, and AIX has no /dev/stdout dnl to work around that, so we don't bother with XLC. dnl AC_DEFUN(AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT, [ AC_MSG_CHECKING([whether the compiler supports generating dependencies]) if test "$GCC" = yes ; then # # GCC, or a compiler deemed to be GCC by AC_PROG_CC (even # though it's not); we assume that, in this case, the flag # would be -M. # ac_lbl_dependency_flag="-M" else # # Not GCC or a compiler deemed to be GCC; what platform is # this? (We're assuming that if the compiler isn't GCC # it's the compiler from the vendor of the OS; that won't # necessarily be true for x86 platforms, where it might be # the Intel C compiler.) # case "$host_os" in irix*|osf*|darwin*) # # MIPS C for IRIX, DEC C, and clang all use -M. # ac_lbl_dependency_flag="-M" ;; solaris*) # # Sun C uses -xM. # ac_lbl_dependency_flag="-xM" ;; hpux*) # # HP's older C compilers don't support this. # HP's newer C compilers support this with # either +M or +Make; the older compilers # interpret +M as something completely # different, so we use +Make so we don't # think it works with the older compilers. # ac_lbl_dependency_flag="+Make" ;; *) # # Not one of the above; assume no support for # generating dependencies. # ac_lbl_dependency_flag="" ;; esac fi # # Is ac_lbl_dependency_flag defined and, if so, does the compiler # complain about it? # # Note: clang doesn't seem to exit with an error status when handed # an unknown non-warning error, even if you pass it # -Werror=unknown-warning-option. However, it always supports # -M, so the fact that this test always succeeds with clang # isn't an issue. # if test ! -z "$ac_lbl_dependency_flag"; then AC_LANG_CONFTEST( [AC_LANG_SOURCE([[int main(void) { return 0; }]])]) if AC_RUN_LOG([eval "$CC $ac_lbl_dependency_flag conftest.c >/dev/null 2>&1"]); then AC_MSG_RESULT([yes, with $ac_lbl_dependency_flag]) DEPENDENCY_CFLAG="$ac_lbl_dependency_flag" MKDEP='${top_srcdir}/mkdep' else AC_MSG_RESULT([no]) # # We can't run mkdep, so have "make depend" do # nothing. # MKDEP='${top_srcdir}/nomkdep' fi rm -rf conftest* else AC_MSG_RESULT([no]) # # We can't run mkdep, so have "make depend" do # nothing. # MKDEP='${top_srcdir}/nomkdep' fi AC_SUBST(DEPENDENCY_CFLAG) AC_SUBST(MKDEP) ]) dnl dnl Determine what options are needed to build a shared library dnl dnl usage: dnl dnl AC_LBL_SHLIBS_INIT dnl dnl results: dnl dnl V_SHLIB_CCOPT (modified to build position-independent code) dnl V_SHLIB_CMD dnl V_SHLIB_OPT dnl V_SONAME_OPT dnl AC_DEFUN(AC_LBL_SHLIBS_INIT, [AC_PREREQ(2.50) if test "$GCC" = yes ; then # # On platforms where we build a shared library: # # add options to generate position-independent code, # if necessary (it's the default in AIX and Darwin/macOS); # # define option to set the soname of the shared library, # if the OS supports that; # # add options to specify, at link time, a directory to # add to the run-time search path, if that's necessary. # V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-shared" case "$host_os" in aix*) ;; freebsd*|netbsd*|openbsd*|dragonfly*|linux*|osf*|haiku*|midipix*) # # Platforms where the C compiler is GCC or accepts # compatible command-line arguments, and the linker # is the GNU linker or accepts compatible command-line # arguments. # # Some instruction sets require -fPIC on some # operating systems. Check for them. If you # have a combination that requires it, add it # here. # PIC_OPT=-fpic case "$host_cpu" in sparc64*) case "$host_os" in freebsd*|openbsd*|linux*) PIC_OPT=-fPIC ;; esac ;; esac V_SHLIB_CCOPT="$V_SHLIB_CCOPT $PIC_OPT" V_SONAME_OPT="-Wl,-soname," ;; hpux*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic" # # XXX - this assumes GCC is using the HP linker, # rather than the GNU linker, and that the "+h" # option is used on all HP-UX platforms, both .sl # and .so. # V_SONAME_OPT="-Wl,+h," # # By default, directories specified with -L # are added to the run-time search path, so # we don't add them in pcap-config. # ;; solaris*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic" # # Sun/Oracle's C compiler, GCC, and GCC-compatible # compilers support -Wl,{comma-separated list of options}, # and we use the C compiler, not ld, for all linking, # including linking to produce a shared library. # V_SONAME_OPT="-Wl,-h," ;; esac else # # Set the appropriate compiler flags and, on platforms # where we build a shared library: # # add options to generate position-independent code, # if necessary (it's the default in Darwin/macOS); # # if we generate ".so" shared libraries, define the # appropriate options for building the shared library; # # add options to specify, at link time, a directory to # add to the run-time search path, if that's necessary. # # Note: spaces after V_SONAME_OPT are significant; on # some platforms the soname is passed with a GCC-like # "-Wl,-soname,{soname}" option, with the soname part # of the option, while on other platforms the C compiler # driver takes it as a regular option with the soname # following the option. # case "$host_os" in aix*) V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-G -bnoentry -bexpall" ;; freebsd*|netbsd*|openbsd*|dragonfly*|linux*) # # Platforms where the C compiler is GCC or accepts # compatible command-line arguments, and the linker # is the GNU linker or accepts compatible command-line # arguments. # # XXX - does 64-bit SPARC require -fPIC? # V_SHLIB_CCOPT="$V_SHLIB_CCOPT -fpic" V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-shared" V_SONAME_OPT="-Wl,-soname," ;; hpux*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT +z" V_SHLIB_CMD="\$(LD)" V_SHLIB_OPT="-b" V_SONAME_OPT="+h " # # By default, directories specified with -L # are added to the run-time search path, so # we don't add them in pcap-config. # ;; osf*) # # Presumed to be DEC OSF/1, Digital UNIX, or # Tru64 UNIX. # V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-shared" V_SONAME_OPT="-soname " ;; solaris*) V_SHLIB_CCOPT="$V_SHLIB_CCOPT -Kpic" V_SHLIB_CMD="\$(CC)" V_SHLIB_OPT="-G" # # Sun/Oracle's C compiler, GCC, and GCC-compatible # compilers support -Wl,{comma-separated list of options}, # and we use the C compiler, not ld, for all linking, # including linking to produce a shared library. # V_SONAME_OPT="-Wl,-h," ;; esac fi ]) # # Try compiling a sample of the type of code that appears in # gencode.c with "inline", "__inline__", and "__inline". # # Autoconf's AC_C_INLINE, at least in autoconf 2.13, isn't good enough, # as it just tests whether a function returning "int" can be inlined; # at least some versions of HP's C compiler can inline that, but can't # inline a function that returns a struct pointer. # # Make sure we use the V_CCOPT flags, because some of those might # disable inlining. # AC_DEFUN(AC_LBL_C_INLINE, [AC_MSG_CHECKING(for inline) save_CFLAGS="$CFLAGS" CFLAGS="$V_CCOPT" AC_CACHE_VAL(ac_cv_lbl_inline, [ ac_cv_lbl_inline="" ac_lbl_cc_inline=no for ac_lbl_inline in inline __inline__ __inline do AC_TRY_COMPILE( [#define inline $ac_lbl_inline static inline struct iltest *foo(void); struct iltest { int iltest1; int iltest2; }; static inline struct iltest * foo() { static struct iltest xxx; return &xxx; }],,ac_lbl_cc_inline=yes,) if test "$ac_lbl_cc_inline" = yes ; then break; fi done if test "$ac_lbl_cc_inline" = yes ; then ac_cv_lbl_inline=$ac_lbl_inline fi]) CFLAGS="$save_CFLAGS" if test ! -z "$ac_cv_lbl_inline" ; then AC_MSG_RESULT($ac_cv_lbl_inline) else AC_MSG_RESULT(no) fi AC_DEFINE_UNQUOTED(inline, $ac_cv_lbl_inline, [Define as token for inline if inlining supported])]) # # Test whether we have __atomic_load_n() and __atomic_store_n(). # # We use AC_TRY_LINK because AC_TRY_COMPILE will succeed, as the # compiler will just think that those functions are undefined, # and perhaps warn about that, but not fail to compile. # AC_DEFUN(AC_PCAP_C___ATOMICS, [ AC_MSG_CHECKING(for __atomic_load_n) AC_CACHE_VAL(ac_cv_have___atomic_load_n, AC_TRY_LINK([], [ int i = 17; int j; j = __atomic_load_n(&i, __ATOMIC_RELAXED); ], ac_have___atomic_load_n=yes, ac_have___atomic_load_n=no)) AC_MSG_RESULT($ac_have___atomic_load_n) if test $ac_have___atomic_load_n = yes ; then AC_DEFINE(HAVE___ATOMIC_LOAD_N, 1, [define if __atomic_load_n is supported by the compiler]) fi AC_MSG_CHECKING(for __atomic_store_n) AC_CACHE_VAL(ac_cv_have___atomic_store_n, AC_TRY_LINK([], [ int i; __atomic_store_n(&i, 17, __ATOMIC_RELAXED); ], ac_have___atomic_store_n=yes, ac_have___atomic_store_n=no)) AC_MSG_RESULT($ac_have___atomic_store_n) if test $ac_have___atomic_store_n = yes ; then AC_DEFINE(HAVE___ATOMIC_STORE_N, 1, [define if __atomic_store_n is supported by the compiler]) fi]) dnl dnl If using gcc, make sure we have ANSI ioctl definitions dnl dnl usage: dnl dnl AC_LBL_FIXINCLUDES dnl AC_DEFUN(AC_LBL_FIXINCLUDES, [if test "$GCC" = yes ; then AC_MSG_CHECKING(for ANSI ioctl definitions) AC_CACHE_VAL(ac_cv_lbl_gcc_fixincludes, AC_TRY_COMPILE( [/* * This generates a "duplicate case value" when fixincludes * has not be run. */ # include # include # include # ifdef HAVE_SYS_IOCCOM_H # include # endif], [switch (0) { case _IO('A', 1):; case _IO('B', 1):; }], ac_cv_lbl_gcc_fixincludes=yes, ac_cv_lbl_gcc_fixincludes=no)) AC_MSG_RESULT($ac_cv_lbl_gcc_fixincludes) if test $ac_cv_lbl_gcc_fixincludes = no ; then # Don't cache failure unset ac_cv_lbl_gcc_fixincludes AC_MSG_ERROR(see the INSTALL for more info) fi fi]) dnl dnl Checks to see if union wait is used with WEXITSTATUS() dnl dnl usage: dnl dnl AC_LBL_UNION_WAIT dnl dnl results: dnl dnl DECLWAITSTATUS (defined) dnl AC_DEFUN(AC_LBL_UNION_WAIT, [AC_MSG_CHECKING(if union wait is used) AC_CACHE_VAL(ac_cv_lbl_union_wait, AC_TRY_COMPILE([ # include # include ], [int status; u_int i = WEXITSTATUS(status); u_int j = waitpid(0, &status, 0);], ac_cv_lbl_union_wait=no, ac_cv_lbl_union_wait=yes)) AC_MSG_RESULT($ac_cv_lbl_union_wait) if test $ac_cv_lbl_union_wait = yes ; then AC_DEFINE(DECLWAITSTATUS,union wait,[type for wait]) else AC_DEFINE(DECLWAITSTATUS,int,[type for wait]) fi]) dnl dnl Checks to see if -R is used dnl dnl usage: dnl dnl AC_LBL_HAVE_RUN_PATH dnl dnl results: dnl dnl ac_cv_lbl_have_run_path (yes or no) dnl AC_DEFUN(AC_LBL_HAVE_RUN_PATH, [AC_MSG_CHECKING(for ${CC-cc} -R) AC_CACHE_VAL(ac_cv_lbl_have_run_path, [echo 'main(){}' > conftest.c ${CC-cc} -o conftest conftest.c -R/a1/b2/c3 >conftest.out 2>&1 if test ! -s conftest.out ; then ac_cv_lbl_have_run_path=yes else ac_cv_lbl_have_run_path=no fi rm -f -r conftest*]) AC_MSG_RESULT($ac_cv_lbl_have_run_path) ]) dnl dnl If the file .devel exists: dnl Add some warning flags if the compiler supports them dnl If an os prototype include exists, symlink os-proto.h to it dnl dnl usage: dnl dnl AC_LBL_DEVEL(copt) dnl dnl results: dnl dnl $1 (copt appended) dnl HAVE_OS_PROTO_H (defined) dnl os-proto.h (symlinked) dnl AC_DEFUN(AC_LBL_DEVEL, [rm -f os-proto.h if test "${LBL_CFLAGS+set}" = set; then $1="$$1 ${LBL_CFLAGS}" fi if test -f .devel ; then # # Skip all the warning option stuff on some compilers. # if test "$ac_lbl_cc_dont_try_gcc_dashW" != yes; then AC_LBL_CHECK_COMPILER_OPT($1, -W) AC_LBL_CHECK_COMPILER_OPT($1, -Wall) AC_LBL_CHECK_COMPILER_OPT($1, -Wcomma) AC_LBL_CHECK_COMPILER_OPT($1, -Wdocumentation) AC_LBL_CHECK_COMPILER_OPT($1, -Wformat-nonliteral) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-noreturn) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-prototypes) AC_LBL_CHECK_COMPILER_OPT($1, -Wmissing-variable-declarations) AC_LBL_CHECK_COMPILER_OPT($1, -Wpointer-arith) AC_LBL_CHECK_COMPILER_OPT($1, -Wpointer-sign) AC_LBL_CHECK_COMPILER_OPT($1, -Wshadow) AC_LBL_CHECK_COMPILER_OPT($1, -Wsign-compare) AC_LBL_CHECK_COMPILER_OPT($1, -Wstrict-prototypes) AC_LBL_CHECK_COMPILER_OPT($1, -Wunused-parameter) AC_LBL_CHECK_COMPILER_OPT($1, -Wused-but-marked-unused) # Warns about safeguards added in case the enums are # extended # AC_LBL_CHECK_COMPILER_OPT($1, -Wcovered-switch-default) # # This can cause problems with ntohs(), ntohl(), # htons(), and htonl() on some platforms, such # as OpenBSD 6.3 with Clang 5.0.1. I guess the # problem is that the macro that ultimately does # the byte-swapping involves a conditional # expression that tests whether the value being # swapped is a compile-time constant or not, # using __builtin_constant_p(), and, depending # on whether it is, does a compile-time swap or # a run-time swap; perhaps the compiler always # considers one of the two results of the # conditional expressin is never evaluated, # because the conditional check is done at # compile time, and thus always says "that # expression is never executed". # # (Perhaps there should be a way of flagging # an expression that you *want* evaluated at # compile time, so that the compiler 1) warns # if it *can't* be evaluated at compile time # and 2) *doesn't* warn that the true or false # branch will never be reached.) # AC_LBL_CHECK_COMPILER_OPT($1, -Wunreachable-code, [ #include unsigned short testme(unsigned short a) { return ntohs(a); } ], [generates warnings from ntohs()]) AC_LBL_CHECK_COMPILER_OPT($1, -Wshorten-64-to-32) fi AC_LBL_CHECK_DEPENDENCY_GENERATION_OPT() # # We used to set -n32 for IRIX 6 when not using GCC (presumed # to mean that we're using MIPS C or MIPSpro C); it specified # the "new" faster 32-bit ABI, introduced in IRIX 6.2. I'm # not sure why that would be something to do *only* with a # .devel file; why should the ABI for which we produce code # depend on .devel? # os=`echo $host_os | sed -e 's/\([[0-9]][[0-9]]*\)[[^0-9]].*$/\1/'` name="lbl/os-$os.h" if test -f $name ; then ln -s $name os-proto.h AC_DEFINE(HAVE_OS_PROTO_H, 1, [if there's an os_proto.h for this platform, to use additional prototypes]) else AC_MSG_WARN(can't find $name) fi fi]) dnl dnl Improved version of AC_CHECK_LIB dnl dnl Thanks to John Hawkinson (jhawk@mit.edu) dnl dnl usage: dnl dnl AC_LBL_CHECK_LIB(LIBRARY, FUNCTION [, ACTION-IF-FOUND [, dnl ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]]) dnl dnl results: dnl dnl LIBS dnl dnl XXX - "AC_LBL_LIBRARY_NET" was redone to use "AC_SEARCH_LIBS" dnl rather than "AC_LBL_CHECK_LIB", so this isn't used any more. dnl We keep it around for reference purposes in case it's ever dnl useful in the future. dnl define(AC_LBL_CHECK_LIB, [AC_MSG_CHECKING([for $2 in -l$1]) dnl Use a cache variable name containing the library, function dnl name, and extra libraries to link with, because the test really is dnl for library $1 defining function $2, when linked with potinal dnl library $5, not just for library $1. Separate tests with the same dnl $1 and different $2's or $5's may have different results. ac_lib_var=`echo $1['_']$2['_']$5 | sed 'y%./+- %__p__%'` AC_CACHE_VAL(ac_cv_lbl_lib_$ac_lib_var, [ac_save_LIBS="$LIBS" LIBS="-l$1 $5 $LIBS" AC_TRY_LINK(dnl ifelse([$2], [main], , dnl Avoid conflicting decl of main. [/* Override any gcc2 internal prototype to avoid an error. */ ]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus extern "C" #endif ])dnl [/* We use char because int might match the return type of a gcc2 builtin and then its argument prototype would still apply. */ char $2(); ]), [$2()], eval "ac_cv_lbl_lib_$ac_lib_var=yes", eval "ac_cv_lbl_lib_$ac_lib_var=no") LIBS="$ac_save_LIBS" ])dnl if eval "test \"`echo '$ac_cv_lbl_lib_'$ac_lib_var`\" = yes"; then AC_MSG_RESULT(yes) ifelse([$3], , [changequote(, )dnl ac_tr_lib=HAVE_LIB`echo $1 | sed -e 's/[^a-zA-Z0-9_]/_/g' \ -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/'` changequote([, ])dnl AC_DEFINE_UNQUOTED($ac_tr_lib) LIBS="-l$1 $LIBS" ], [$3]) else AC_MSG_RESULT(no) ifelse([$4], , , [$4 ])dnl fi ]) dnl dnl AC_LBL_LIBRARY_NET dnl dnl This test is for network applications that need socket functions and dnl getaddrinfo()/getnameinfo()-ish functions. We now require dnl getaddrinfo() and getnameinfo(). We also prefer versions of dnl recvmsg() that conform to the Single UNIX Specification, so that we dnl can check whether a datagram received with recvmsg() was truncated dnl when received due to the buffer being too small. dnl dnl On most operating systems, they're available in the system library. dnl dnl Under Solaris, we need to link with libsocket and libnsl to get dnl getaddrinfo() and getnameinfo() and, if we have libxnet, we need to dnl link with libxnet before libsocket to get a version of recvmsg() dnl that conforms to the Single UNIX Specification. dnl dnl We use getaddrinfo() because we want a portable thread-safe way dnl of getting information for a host name or port; there exist _r dnl versions of gethostbyname() and getservbyname() on some platforms, dnl but not on all platforms. dnl AC_DEFUN(AC_LBL_LIBRARY_NET, [ # # Most operating systems have getaddrinfo() in the default searched # libraries (i.e. libc). Check there first. # AC_CHECK_FUNC(getaddrinfo,, [ # # Not found in the standard system libraries. # Try libsocket, which requires libnsl. # AC_CHECK_LIB(socket, getaddrinfo, [ # # OK, we found it in libsocket. # LIBS="-lsocket -lnsl $LIBS" ], [ # # Not found in libsocket; test for it in libnetwork, which # is where it is in Haiku. # AC_CHECK_LIB(network, getaddrinfo, [ # # OK, we found it in libnetwork. # LIBS="-lnetwork $LIBS" ], [ # # We didn't find it. # AC_MSG_ERROR([getaddrinfo is required, but wasn't found]) ]) ], -lnsl) # # OK, do we have recvmsg() in libxnet? # We also link with libsocket and libnsl. # AC_CHECK_LIB(xnet, recvmsg, [ # # Yes - link with it as well. # LIBS="-lxnet $LIBS" ], , -lsocket -lnsl) ]) # DLPI needs putmsg under HPUX so test for -lstr while we're at it AC_SEARCH_LIBS(putmsg, str) ]) m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) dnl pkg.m4 - Macros to locate and utilise pkg-config. -*- Autoconf -*- dnl serial 11 (pkg-config-0.29) dnl dnl Copyright © 2004 Scott James Remnant . dnl Copyright © 2012-2015 Dan Nicholson dnl dnl This program is free software; you can redistribute it and/or modify dnl it under the terms of the GNU General Public License as published by dnl the Free Software Foundation; either version 2 of the License, or dnl (at your option) any later version. dnl dnl This program is distributed in the hope that it will be useful, but dnl WITHOUT ANY WARRANTY; without even the implied warranty of dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU dnl General Public License for more details. dnl dnl You should have received a copy of the GNU General Public License dnl along with this program; if not, write to the Free Software dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA dnl 02111-1307, USA. dnl dnl As a special exception to the GNU General Public License, if you dnl distribute this file as part of a program that contains a dnl configuration script generated by Autoconf, you may include it under dnl the same distribution terms that you use for the rest of that dnl program. dnl PKG_PREREQ(MIN-VERSION) dnl ----------------------- dnl Since: 0.29 dnl dnl Verify that the version of the pkg-config macros are at least dnl MIN-VERSION. Unlike PKG_PROG_PKG_CONFIG, which checks the user's dnl installed version of pkg-config, this checks the developer's version dnl of pkg.m4 when generating configure. dnl dnl To ensure that this macro is defined, also add: dnl m4_ifndef([PKG_PREREQ], dnl [m4_fatal([must install pkg-config 0.29 or later before running autoconf/autogen])]) dnl dnl See the "Since" comment for each macro you use to see what version dnl of the macros you require. m4_defun([PKG_PREREQ], [m4_define([PKG_MACROS_VERSION], [0.29]) m4_if(m4_version_compare(PKG_MACROS_VERSION, [$1]), -1, [m4_fatal([pkg.m4 version $1 or higher is required but ]PKG_MACROS_VERSION[ found])]) ])dnl PKG_PREREQ dnl PKG_PROG_PKG_CONFIG([MIN-VERSION]) dnl ---------------------------------- dnl Since: 0.16 dnl dnl Search for the pkg-config tool and set the PKG_CONFIG variable to dnl first found in the path. Checks that the version of pkg-config found dnl is at least MIN-VERSION. If MIN-VERSION is not specified, 0.17.0 is dnl used since that's the first version where --static was supported. AC_DEFUN([PKG_PROG_PKG_CONFIG], [m4_pattern_forbid([^_?PKG_[A-Z_]+$]) m4_pattern_allow([^PKG_CONFIG(_(PATH|LIBDIR|SYSROOT_DIR|ALLOW_SYSTEM_(CFLAGS|LIBS)))?$]) m4_pattern_allow([^PKG_CONFIG_(DISABLE_UNINSTALLED|TOP_BUILD_DIR|DEBUG_SPEW)$]) AC_ARG_VAR([PKG_CONFIG], [path to pkg-config utility]) AC_ARG_VAR([PKG_CONFIG_PATH], [directories to add to pkg-config's search path]) AC_ARG_VAR([PKG_CONFIG_LIBDIR], [path overriding pkg-config's built-in search path]) if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then AC_PATH_TOOL([PKG_CONFIG], [pkg-config]) fi if test -n "$PKG_CONFIG"; then _pkg_min_version=m4_default([$1], [0.17.0]) AC_MSG_CHECKING([pkg-config is at least version $_pkg_min_version]) if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) PKG_CONFIG="" fi fi[]dnl ])dnl PKG_PROG_PKG_CONFIG dnl PKG_CHECK_EXISTS(MODULES, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ------------------------------------------------------------------- dnl Since: 0.18 dnl dnl Check to see whether a particular set of modules exists. Similar to dnl PKG_CHECK_MODULES(), but does not set variables or print errors. AC_DEFUN([PKG_CHECK_EXISTS], [ if test -n "$PKG_CONFIG" && \ AC_RUN_LOG([$PKG_CONFIG --exists --print-errors "$1"]); then m4_default([$2], [:]) m4_ifvaln([$3], [else $3])dnl fi]) dnl _PKG_CONFIG([VARIABLE], [FLAGS], [MODULES]) dnl --------------------------------------------- dnl Internal wrapper calling pkg-config via PKG_CONFIG and setting dnl pkg_failed based on the result. m4_define([_PKG_CONFIG], [if test -n "$$1"; then pkg_cv_[]$1="$$1" elif test -n "$PKG_CONFIG"; then PKG_CHECK_EXISTS([$3], [pkg_cv_[]$1=`$PKG_CONFIG $2 "$3" 2>/dev/null` test "x$?" != "x0" && pkg_failed=yes ], [pkg_failed=yes]) else pkg_failed=untried fi[]dnl ])dnl _PKG_CONFIG dnl _PKG_SHORT_ERRORS_SUPPORTED dnl --------------------------- dnl Internal check to see if pkg-config supports short errors. AC_DEFUN([_PKG_SHORT_ERRORS_SUPPORTED], [ if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then _pkg_short_errors_supported=yes else _pkg_short_errors_supported=no fi[]dnl ])dnl _PKG_SHORT_ERRORS_SUPPORTED dnl PKG_CHECK_MODULES(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], dnl [ACTION-IF-NOT-FOUND]) dnl -------------------------------------------------------------- dnl Since: 0.4.0 AC_DEFUN([PKG_CHECK_MODULES], [ AC_ARG_VAR([$1][_CFLAGS], [C compiler flags for $2, overriding pkg-config])dnl AC_ARG_VAR([$1][_LIBS], [linker flags for $2, overriding pkg-config])dnl AC_ARG_VAR([$1][_LIBS_STATIC], [static-link linker flags for $2, overriding pkg-config])dnl pkg_failed=no AC_MSG_CHECKING([for $2 with pkg-config]) PKG_CHECK_EXISTS($2, [ # # The package was found, so try to get its C flags and # libraries. # _PKG_CONFIG([$1][_CFLAGS], [--cflags], [$2]) _PKG_CONFIG([$1][_LIBS], [--libs], [$2]) _PKG_CONFIG([$1][_LIBS_STATIC], [--libs --static], [$2]) m4_define([_PKG_TEXT], [ Alternatively, you may set the environment variables $1[]_CFLAGS and $1[]_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details.]) if test $pkg_failed = yes; then # # That failed - report an error. # AC_MSG_RESULT([error]) _PKG_SHORT_ERRORS_SUPPORTED if test $_pkg_short_errors_supported = yes; then $1[]_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "$2" 2>&1` else $1[]_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "$2" 2>&1` fi # Put the nasty error message in config.log where it belongs echo "$$1[]_PKG_ERRORS" >&AS_MESSAGE_LOG_FD m4_default([$4], [AC_MSG_ERROR( [Package requirements ($2) were not met: $$1_PKG_ERRORS Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. _PKG_TEXT])[]dnl ]) elif test $pkg_failed = untried; then # # We don't have pkg-config, so it didn't work. # AC_MSG_RESULT([not found (pkg-config not found)]) else # # We found the package. # $1[]_CFLAGS=$pkg_cv_[]$1[]_CFLAGS $1[]_LIBS=$pkg_cv_[]$1[]_LIBS $1[]_LIBS_STATIC=$pkg_cv_[]$1[]_LIBS_STATIC AC_MSG_RESULT([found]) $3 fi[]dnl ], [ # # The package isn't present. # AC_MSG_RESULT([not found]) ]) ])dnl PKG_CHECK_MODULES dnl PKG_CHECK_MODULES_STATIC(VARIABLE-PREFIX, MODULES, [ACTION-IF-FOUND], dnl [ACTION-IF-NOT-FOUND]) dnl --------------------------------------------------------------------- dnl Since: 0.29 dnl dnl Checks for existence of MODULES and gathers its build flags with dnl static libraries enabled. Sets VARIABLE-PREFIX_CFLAGS from --cflags dnl and VARIABLE-PREFIX_LIBS from --libs. AC_DEFUN([PKG_CHECK_MODULES_STATIC], [ _save_PKG_CONFIG=$PKG_CONFIG PKG_CONFIG="$PKG_CONFIG --static" PKG_CHECK_MODULES($@) PKG_CONFIG=$_save_PKG_CONFIG[]dnl ])dnl PKG_CHECK_MODULES_STATIC dnl PKG_INSTALLDIR([DIRECTORY]) dnl ------------------------- dnl Since: 0.27 dnl dnl Substitutes the variable pkgconfigdir as the location where a module dnl should install pkg-config .pc files. By default the directory is dnl $libdir/pkgconfig, but the default can be changed by passing dnl DIRECTORY. The user can override through the --with-pkgconfigdir dnl parameter. AC_DEFUN([PKG_INSTALLDIR], [m4_pushdef([pkg_default], [m4_default([$1], ['${libdir}/pkgconfig'])]) m4_pushdef([pkg_description], [pkg-config installation directory @<:@]pkg_default[@:>@]) AC_ARG_WITH([pkgconfigdir], [AS_HELP_STRING([--with-pkgconfigdir], pkg_description)],, [with_pkgconfigdir=]pkg_default) AC_SUBST([pkgconfigdir], [$with_pkgconfigdir]) m4_popdef([pkg_default]) m4_popdef([pkg_description]) ])dnl PKG_INSTALLDIR dnl PKG_NOARCH_INSTALLDIR([DIRECTORY]) dnl -------------------------------- dnl Since: 0.27 dnl dnl Substitutes the variable noarch_pkgconfigdir as the location where a dnl module should install arch-independent pkg-config .pc files. By dnl default the directory is $datadir/pkgconfig, but the default can be dnl changed by passing DIRECTORY. The user can override through the dnl --with-noarch-pkgconfigdir parameter. AC_DEFUN([PKG_NOARCH_INSTALLDIR], [m4_pushdef([pkg_default], [m4_default([$1], ['${datadir}/pkgconfig'])]) m4_pushdef([pkg_description], [pkg-config arch-independent installation directory @<:@]pkg_default[@:>@]) AC_ARG_WITH([noarch-pkgconfigdir], [AS_HELP_STRING([--with-noarch-pkgconfigdir], pkg_description)],, [with_noarch_pkgconfigdir=]pkg_default) AC_SUBST([noarch_pkgconfigdir], [$with_noarch_pkgconfigdir]) m4_popdef([pkg_default]) m4_popdef([pkg_description]) ])dnl PKG_NOARCH_INSTALLDIR dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE, dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND]) dnl ------------------------------------------- dnl Since: 0.28 dnl dnl Retrieves the value of the pkg-config variable for the given module. AC_DEFUN([PKG_CHECK_VAR], [ AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl _PKG_CONFIG([$1], [--variable="][$3]["], [$2]) AS_VAR_COPY([$1], [pkg_cv_][$1]) AS_VAR_IF([$1], [""], [$5], [$4])dnl ])dnl PKG_CHECK_VAR