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There are configure scripts in this directory to generate the header files
used by the jemalloc library.
These scripts are named conf_<HOST_TYPE>.sh, where HOST_TYPE is one of
aarch64, arm, mips, x86, x86_64.
In order to build generate the header files for each supported HOST_TYPE,
follow these steps:
- source build/envsetup.sh
- lunch <TARGET>
- mmma -jXX bionic
- cd external/jemalloc
- autoconf
- <Modify the configure script>
- android/conf_<HOST_TYPE>.sh
Follow these instructions to modify the configure script before running
any of the conf_<HOST_TYPE>.sh scripts.
In the code that looks similar to this:
case "${host}" in
*-*-darwin*)
Modify it to be:
case "${host}" in
*android*)
CFLAGS="$CFLAGS"
CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
abi="elf"
force_tls="0"
enable_tls="0"
$as_echo "#define JEMALLOC_HAS_ALLOCA_H 1" >>confdefs.h
$as_echo "#define JEMALLOC_PURGE_MADVISE_DONTNEED " >>confdefs.h
$as_echo "#define JEMALLOC_THREADED_INIT " >>confdefs.h
;;
*-*-darwin*)
Then in the section that begins with:
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking STATIC_PAGE_SHIFT" >&5
$as_echo_n "checking STATIC_PAGE_SHIFT... " >&6; }
Comment out all of the script until after this part of the script:
if test "x$je_cv_static_page_shift" != "xundefined"; then
cat >>confdefs.h <<_ACEOF
#define STATIC_PAGE_SHIFT $je_cv_static_page_shift
_ACEOF
else
as_fn_error $? "cannot determine value for STATIC_PAGE_SHIFT" "$LINENO" 5
fi
Make sure all of the above is also commented out. Then add these lines into
the configure script:
# Hard coded to 12 for since the page size is 4096.
cat >>confdefs.h <<_ACEOF
#define STATIC_PAGE_SHIFT 12
_ACEOF
This assumes page size is 4096, if this changes, this code needs to be
modified.
This hard-coding of STATIC_PAGE_SHIFT is necessary because the current
configure script attempts to build an executable to print out this value.
For any cross-compilation of this code, this does not work.
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