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#!/bin/sh
# This script is invoked by Android build system "WITH_SYNTAX_CHECK=1 m/mm/mmm ..." and
# accepts command line in the following format:
#
# ccc-analyzer ARCH LOCAL_CC ...
#
# Under WITH_SYNTAX_CHECK=1, m/mm/mmm/mma/mmma wrap "make" with "tools/scan-build/scan-build"
# which utillizes "clang --analyze" for static code analyses. Script scan-build interposes
# on compiler with CC/CXX ignored by the Android build system unfortunately. Instead,
# Android build system recognizes WITH_SYNTAX_CHECK and replace LOCAL_CC with our own ccc-syntax,
# which in turn setup the following env. vars expected by tools/scan-build/ccc-analyzer
#
# CCC_CC: The origianl LOCAL_CC which does the real compilation and code-gen
# CLANG: The clang compiler which run code analyses
#
# Our own ccc-syntax also export the following, and tools/scan-build/ccc-analyzer is slightly
# modified to prefix/append them in options passed to clang for successful compilation
#
# CLANG_FLAGS: Flags to set correct target, be compatible with gcc, etc
# CLANG_FLAGS_END: Flags to override "$@"
#
ARCH="$1"
LOCAL_CC="$2"
shift ; shift
# Turn off warning about unused options
CLANG_FLAGS="-Qunused-arguments"
# Turn off unknown warning options
CLANG_FLAGS="$CLANG_FLAGS -Wno-unknown-warning-option"
# Define WITH_SYNTAX_CHECK for code wish to behave differently when check
CLANG_FLAGS="$CLANG_FLAGS -DWITH_SYNTAX_CHECK"
# If LOCAL_CC is not clang and not compiling in c++ mode, turn on -std=gnu89 by default
# and let "$@" later override it, if any
test "$LOCAL_CC" != "${LOCAL_CC%-x c++}" -o "$LOCAL_CC" = "${LOCAL_CC%-xc++}" && cxx_mode=true
if [ "$LOCAL_CC" = "${LOCAL_CC%clang}" -a "$cxx_mode" != "true" ] ; then
CLANG_FLAGS="$CLANG_FLAGS -std=gnu89"
fi
# Turn off warnings which aren't useful in this context
CLANG_FLAGS="$CLANG_FLAGS -Wno-ignored-attributes -Wno-pedantic -Wno-builtin-requires-header -Wno-gnu -Wno-gnu-designator -Wno-knr-promoted-parameter"
if [ "$ARCH" != "host" ]; then
# Add target to get proper pre-defined preprocessor symbols/macros.
case $ARCH in
arm) CLANG_FLAGS="$CLANG_FLAGS -target armv5te-none-linux-androideabi"
;;
mips) CLANG_FLAGS="$CLANG_FLAGS -target mipsel-none-linux-android"
;;
x86) CLANG_FLAGS="$CLANG_FLAGS -target i686-none-linux-android"
;;
esac
if [ "$LOCAL_CC" != "${LOCAL_CC%clang*}" ]; then
# Don't look for its own lib/clang/3.3/include when LOCAL_CC is clang
# which is rebuilt from source w/o installing its include as well
CLANG_FLAGS="$CLANG_FLAGS -nostdinc"
fi
else
# Note that unlike target flags where Android build system explicitly specify
# everything in command line, host tools have their own sysroot and --sysroot
# isn't explicitly added in the commmand line. Likelywise for other gcc implicit
# search directories.
#
# We can query search paths by doing "gcc -v" and parsing the output with
# sed -n '1,/BEGIN/!{ /END/,/BEING/!p; }' (*1), but forking gcc here adds overhead.
# Because host tool refresh only once 1-2 year, here we hard-code the path obtained by (*2).
# ToDo: The build system can do it once for each module, although it still needs to
# prepare both -m32 and -m64 versions, anding 2 more args in additional to $ARCH
# and $LOCAL_CC
#
# (*1) as described in http://sed.sourceforge.net/sedfaq4.html#s4.24
# (*2) prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1/bin/i686-apple-darwin10-gcc -m64 -v -E - < /dev/null 2>&1 | \
# sed -n '1,/> search starts here/!{ /End of search list/,/> search starts here/!p; }' |\
# sed -e 's/^/-I/'
# Likewise for -m32
#
CLANG_FLAGS_END="\
-I prebuilts/gcc/darwin-x86/host/i686-apple-darwin-4.2.1/lib/gcc/i686-apple-darwin10/4.2.1/include"
fi
# Turn off warnings (at the end) on features we exploit
CLANG_FLAGS_END="$CLANG_FLAGS_END -Wno-return-type-c-linkage"
# Call the real ccc-analyzer. Note that tools/scan-build/ccc-analyzer "exec" $CCC_CC,
# which is LOCAL_CC w/o optional ccache (in "ccache gcc" format)
export CCC_CC="${LOCAL_CC##* }"
export CLANG="`dirname $0`/analyzer"
export CLANG_FLAGS
export CLANG_FLAGS_END
`dirname $0`/../tools/scan-build/ccc-analyzer "$@"
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