diff options
Diffstat (limited to 'js/src/ctypes/libffi/acinclude.m4')
| -rw-r--r-- | js/src/ctypes/libffi/acinclude.m4 | 479 |
1 files changed, 479 insertions, 0 deletions
diff --git a/js/src/ctypes/libffi/acinclude.m4 b/js/src/ctypes/libffi/acinclude.m4 new file mode 100644 index 0000000000..1a70efb010 --- /dev/null +++ b/js/src/ctypes/libffi/acinclude.m4 @@ -0,0 +1,479 @@ +# mmap(2) blacklisting. Some platforms provide the mmap library routine +# but don't support all of the features we need from it. +AC_DEFUN([AC_FUNC_MMAP_BLACKLIST], +[ +AC_CHECK_HEADER([sys/mman.h], + [libffi_header_sys_mman_h=yes], [libffi_header_sys_mman_h=no]) +AC_CHECK_FUNC([mmap], [libffi_func_mmap=yes], [libffi_func_mmap=no]) +if test "$libffi_header_sys_mman_h" != yes \ + || test "$libffi_func_mmap" != yes; then + ac_cv_func_mmap_file=no + ac_cv_func_mmap_dev_zero=no + ac_cv_func_mmap_anon=no +else + AC_CACHE_CHECK([whether read-only mmap of a plain file works], + ac_cv_func_mmap_file, + [# Add a system to this blacklist if + # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a + # memory area containing the same data that you'd get if you applied + # read() to the same fd. The only system known to have a problem here + # is VMS, where text files have record structure. + case "$host_os" in + vms* | ultrix*) + ac_cv_func_mmap_file=no ;; + *) + ac_cv_func_mmap_file=yes;; + esac]) + AC_CACHE_CHECK([whether mmap from /dev/zero works], + ac_cv_func_mmap_dev_zero, + [# Add a system to this blacklist if it has mmap() but /dev/zero + # does not exist, or if mmapping /dev/zero does not give anonymous + # zeroed pages with both the following properties: + # 1. If you map N consecutive pages in with one call, and then + # unmap any subset of those pages, the pages that were not + # explicitly unmapped remain accessible. + # 2. If you map two adjacent blocks of memory and then unmap them + # both at once, they must both go away. + # Systems known to be in this category are Windows (all variants), + # VMS, and Darwin. + case "$host_os" in + vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00) + ac_cv_func_mmap_dev_zero=no ;; + *) + ac_cv_func_mmap_dev_zero=yes;; + esac]) + + # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for. + AC_CACHE_CHECK([for MAP_ANON(YMOUS)], ac_cv_decl_map_anon, + [AC_TRY_COMPILE( +[#include <sys/types.h> +#include <sys/mman.h> +#include <unistd.h> + +#ifndef MAP_ANONYMOUS +#define MAP_ANONYMOUS MAP_ANON +#endif +], +[int n = MAP_ANONYMOUS;], + ac_cv_decl_map_anon=yes, + ac_cv_decl_map_anon=no)]) + + if test $ac_cv_decl_map_anon = no; then + ac_cv_func_mmap_anon=no + else + AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works], + ac_cv_func_mmap_anon, + [# Add a system to this blacklist if it has mmap() and MAP_ANON or + # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) + # doesn't give anonymous zeroed pages with the same properties listed + # above for use of /dev/zero. + # Systems known to be in this category are Windows, VMS, and SCO Unix. + case "$host_os" in + vms* | cygwin* | pe | mingw* | sco* | udk* ) + ac_cv_func_mmap_anon=no ;; + *) + ac_cv_func_mmap_anon=yes;; + esac]) + fi +fi + +if test $ac_cv_func_mmap_file = yes; then + AC_DEFINE(HAVE_MMAP_FILE, 1, + [Define if read-only mmap of a plain file works.]) +fi +if test $ac_cv_func_mmap_dev_zero = yes; then + AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1, + [Define if mmap of /dev/zero works.]) +fi +if test $ac_cv_func_mmap_anon = yes; then + AC_DEFINE(HAVE_MMAP_ANON, 1, + [Define if mmap with MAP_ANON(YMOUS) works.]) +fi +]) + +dnl ---------------------------------------------------------------------- +dnl This whole bit snagged from libstdc++-v3, via libatomic. + +dnl +dnl LIBFFI_ENABLE +dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) +dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) +dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) +dnl +dnl See docs/html/17_intro/configury.html#enable for documentation. +dnl +m4_define([LIBFFI_ENABLE],[dnl +m4_define([_g_switch],[--enable-$1])dnl +m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl + AC_ARG_ENABLE($1,_g_help, + m4_bmatch([$5], + [^permit ], + [[ + case "$enableval" in + m4_bpatsubst([$5],[permit ])) ;; + *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; + dnl Idea for future: generate a URL pointing to + dnl "onlinedocs/configopts.html#whatever" + esac + ]], + [^$], + [[ + case "$enableval" in + yes|no) ;; + *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; + esac + ]], + [[$5]]), + [enable_]m4_bpatsubst([$1],-,_)[=][$2]) +m4_undefine([_g_switch])dnl +m4_undefine([_g_help])dnl +]) + +dnl +dnl If GNU ld is in use, check to see if tricky linker opts can be used. If +dnl the native linker is in use, all variables will be defined to something +dnl safe (like an empty string). +dnl +dnl Defines: +dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible +dnl OPT_LDFLAGS='-Wl,-O1' if possible +dnl LD (as a side effect of testing) +dnl Sets: +dnl with_gnu_ld +dnl libat_ld_is_gold (possibly) +dnl libat_gnu_ld_version (possibly) +dnl +dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will +dnl set libat_gnu_ld_version to 12345. Zeros cause problems. +dnl +AC_DEFUN([LIBFFI_CHECK_LINKER_FEATURES], [ + # If we're not using GNU ld, then there's no point in even trying these + # tests. Check for that first. We should have already tested for gld + # by now (in libtool), but require it now just to be safe... + test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' + test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' + AC_REQUIRE([AC_PROG_LD]) + AC_REQUIRE([AC_PROG_AWK]) + + # The name set by libtool depends on the version of libtool. Shame on us + # for depending on an impl detail, but c'est la vie. Older versions used + # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on + # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually + # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't + # set (hence we're using an older libtool), then set it. + if test x${with_gnu_ld+set} != xset; then + if test x${ac_cv_prog_gnu_ld+set} != xset; then + # We got through "ac_require(ac_prog_ld)" and still not set? Huh? + with_gnu_ld=no + else + with_gnu_ld=$ac_cv_prog_gnu_ld + fi + fi + + # Start by getting the version number. I think the libtool test already + # does some of this, but throws away the result. + libat_ld_is_gold=no + if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then + libat_ld_is_gold=yes + fi + changequote(,) + ldver=`$LD --version 2>/dev/null | + sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'` + changequote([,]) + libat_gnu_ld_version=`echo $ldver | \ + $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` + + # Set --gc-sections. + if test "$with_gnu_ld" = "notbroken"; then + # GNU ld it is! Joy and bunny rabbits! + + # All these tests are for C++; save the language and the compiler flags. + # Need to do this so that g++ won't try to link in libstdc++ + ac_test_CFLAGS="${CFLAGS+set}" + ac_save_CFLAGS="$CFLAGS" + CFLAGS='-x c++ -Wl,--gc-sections' + + # Check for -Wl,--gc-sections + # XXX This test is broken at the moment, as symbols required for linking + # are now in libsupc++ (not built yet). In addition, this test has + # cored on solaris in the past. In addition, --gc-sections doesn't + # really work at the moment (keeps on discarding used sections, first + # .eh_frame and now some of the glibc sections for iconv). + # Bzzzzt. Thanks for playing, maybe next time. + AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) + AC_TRY_RUN([ + int main(void) + { + try { throw 1; } + catch (...) { }; + return 0; + } + ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes]) + if test "$ac_test_CFLAGS" = set; then + CFLAGS="$ac_save_CFLAGS" + else + # this is the suspicious part + CFLAGS='' + fi + if test "$ac_sectionLDflags" = "yes"; then + SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" + fi + AC_MSG_RESULT($ac_sectionLDflags) + fi + + # Set linker optimization flags. + if test x"$with_gnu_ld" = x"yes"; then + OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" + fi + + AC_SUBST(SECTION_LDFLAGS) + AC_SUBST(OPT_LDFLAGS) +]) + + +dnl +dnl If GNU ld is in use, check to see if tricky linker opts can be used. If +dnl the native linker is in use, all variables will be defined to something +dnl safe (like an empty string). +dnl +dnl Defines: +dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible +dnl OPT_LDFLAGS='-Wl,-O1' if possible +dnl LD (as a side effect of testing) +dnl Sets: +dnl with_gnu_ld +dnl libat_ld_is_gold (possibly) +dnl libat_gnu_ld_version (possibly) +dnl +dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will +dnl set libat_gnu_ld_version to 12345. Zeros cause problems. +dnl +AC_DEFUN([LIBFFI_CHECK_LINKER_FEATURES], [ + # If we're not using GNU ld, then there's no point in even trying these + # tests. Check for that first. We should have already tested for gld + # by now (in libtool), but require it now just to be safe... + test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' + test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' + AC_REQUIRE([AC_PROG_LD]) + AC_REQUIRE([AC_PROG_AWK]) + + # The name set by libtool depends on the version of libtool. Shame on us + # for depending on an impl detail, but c'est la vie. Older versions used + # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on + # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually + # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't + # set (hence we're using an older libtool), then set it. + if test x${with_gnu_ld+set} != xset; then + if test x${ac_cv_prog_gnu_ld+set} != xset; then + # We got through "ac_require(ac_prog_ld)" and still not set? Huh? + with_gnu_ld=no + else + with_gnu_ld=$ac_cv_prog_gnu_ld + fi + fi + + # Start by getting the version number. I think the libtool test already + # does some of this, but throws away the result. + libat_ld_is_gold=no + if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then + libat_ld_is_gold=yes + fi + libat_ld_is_lld=no + if $LD --version 2>/dev/null | grep 'LLD '> /dev/null 2>&1; then + libat_ld_is_lld=yes + fi + changequote(,) + ldver=`$LD --version 2>/dev/null | + sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'` + changequote([,]) + libat_gnu_ld_version=`echo $ldver | \ + $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` + + # Set --gc-sections. + if test "$with_gnu_ld" = "notbroken"; then + # GNU ld it is! Joy and bunny rabbits! + + # All these tests are for C++; save the language and the compiler flags. + # Need to do this so that g++ won't try to link in libstdc++ + ac_test_CFLAGS="${CFLAGS+set}" + ac_save_CFLAGS="$CFLAGS" + CFLAGS='-x c++ -Wl,--gc-sections' + + # Check for -Wl,--gc-sections + # XXX This test is broken at the moment, as symbols required for linking + # are now in libsupc++ (not built yet). In addition, this test has + # cored on solaris in the past. In addition, --gc-sections doesn't + # really work at the moment (keeps on discarding used sections, first + # .eh_frame and now some of the glibc sections for iconv). + # Bzzzzt. Thanks for playing, maybe next time. + AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) + AC_TRY_RUN([ + int main(void) + { + try { throw 1; } + catch (...) { }; + return 0; + } + ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes]) + if test "$ac_test_CFLAGS" = set; then + CFLAGS="$ac_save_CFLAGS" + else + # this is the suspicious part + CFLAGS='' + fi + if test "$ac_sectionLDflags" = "yes"; then + SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" + fi + AC_MSG_RESULT($ac_sectionLDflags) + fi + + # Set linker optimization flags. + if test x"$with_gnu_ld" = x"yes"; then + OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" + fi + + AC_SUBST(SECTION_LDFLAGS) + AC_SUBST(OPT_LDFLAGS) +]) + + +dnl +dnl Add version tags to symbols in shared library (or not), additionally +dnl marking other symbols as private/local (or not). +dnl +dnl --enable-symvers=style adds a version script to the linker call when +dnl creating the shared library. The choice of version script is +dnl controlled by 'style'. +dnl --disable-symvers does not. +dnl + Usage: LIBFFI_ENABLE_SYMVERS[(DEFAULT)] +dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to +dnl choose a default style based on linker characteristics. Passing +dnl 'no' disables versioning. +dnl +AC_DEFUN([LIBFFI_ENABLE_SYMVERS], [ + +LIBFFI_ENABLE(symvers,yes,[=STYLE], + [enables symbol versioning of the shared library], + [permit yes|no|gnu*|sun]) + +# If we never went through the LIBFFI_CHECK_LINKER_FEATURES macro, then we +# don't know enough about $LD to do tricks... +AC_REQUIRE([LIBFFI_CHECK_LINKER_FEATURES]) + +# Turn a 'yes' into a suitable default. +if test x$enable_symvers = xyes ; then + # FIXME The following test is too strict, in theory. + if test $enable_shared = no || test "x$LD" = x; then + enable_symvers=no + else + if test $with_gnu_ld = yes ; then + enable_symvers=gnu + else + case ${target_os} in + # Sun symbol versioning exists since Solaris 2.5. + solaris2.[[5-9]]* | solaris2.1[[0-9]]*) + enable_symvers=sun ;; + *) + enable_symvers=no ;; + esac + fi + fi +fi + +# Check if 'sun' was requested on non-Solaris 2 platforms. +if test x$enable_symvers = xsun ; then + case ${target_os} in + solaris2*) + # All fine. + ;; + *) + # Unlikely to work. + AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) + AC_MSG_WARN([=== you are not targetting Solaris 2.]) + AC_MSG_WARN([=== Symbol versioning will be disabled.]) + enable_symvers=no + ;; + esac +fi + +# Check to see if libgcc_s exists, indicating that shared libgcc is possible. +if test $enable_symvers != no; then + AC_MSG_CHECKING([for shared libgcc]) + ac_save_CFLAGS="$CFLAGS" + CFLAGS=' -lgcc_s' + AC_TRY_LINK(, [return 0;], libat_shared_libgcc=yes, libat_shared_libgcc=no) + CFLAGS="$ac_save_CFLAGS" + if test $libat_shared_libgcc = no; then + cat > conftest.c <<EOF +int main (void) { return 0; } +EOF +changequote(,)dnl + libat_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ + -shared -shared-libgcc -o conftest.so \ + conftest.c -v 2>&1 >/dev/null \ + | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` +changequote([,])dnl + rm -f conftest.c conftest.so + if test x${libat_libgcc_s_suffix+set} = xset; then + CFLAGS=" -lgcc_s$libat_libgcc_s_suffix" + AC_TRY_LINK(, [return 0;], libat_shared_libgcc=yes) + CFLAGS="$ac_save_CFLAGS" + fi + fi + AC_MSG_RESULT($libat_shared_libgcc) +fi + +# For GNU ld, we need at least this version. The format is described in +# LIBFFI_CHECK_LINKER_FEATURES above. +libat_min_gnu_ld_version=21400 +# XXXXXXXXXXX libat_gnu_ld_version=21390 + +# Check to see if unspecified "yes" value can win, given results above. +# Change "yes" into either "no" or a style name. +if test $enable_symvers != no && test $libat_shared_libgcc = yes; then + if test $with_gnu_ld = yes; then + if test $libat_gnu_ld_version -ge $libat_min_gnu_ld_version ; then + enable_symvers=gnu + elif test $libat_ld_is_gold = yes ; then + enable_symvers=gnu + elif test $libat_ld_is_lld = yes ; then + enable_symvers=gnu + else + # The right tools, the right setup, but too old. Fallbacks? + AC_MSG_WARN(=== Linker version $libat_gnu_ld_version is too old for) + AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) + AC_MSG_WARN(=== You would need to upgrade your binutils to version) + AC_MSG_WARN(=== $libat_min_gnu_ld_version or later and rebuild GCC.) + if test $libat_gnu_ld_version -ge 21200 ; then + # Globbing fix is present, proper block support is not. + dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.]) + dnl enable_symvers=??? + AC_MSG_WARN([=== Symbol versioning will be disabled.]) + enable_symvers=no + else + # 2.11 or older. + AC_MSG_WARN([=== Symbol versioning will be disabled.]) + enable_symvers=no + fi + fi + elif test $enable_symvers = sun; then + : All interesting versions of Sun ld support sun style symbol versioning. + else + # just fail for now + AC_MSG_WARN([=== You have requested some kind of symbol versioning, but]) + AC_MSG_WARN([=== either you are not using a supported linker, or you are]) + AC_MSG_WARN([=== not building a shared libgcc_s (which is required).]) + AC_MSG_WARN([=== Symbol versioning will be disabled.]) + enable_symvers=no + fi +fi +if test $enable_symvers = gnu; then + AC_DEFINE(LIBFFI_GNU_SYMBOL_VERSIONING, 1, + [Define to 1 if GNU symbol versioning is used for libatomic.]) +fi + +AM_CONDITIONAL(LIBFFI_BUILD_VERSIONED_SHLIB, test $enable_symvers != no) +AM_CONDITIONAL(LIBFFI_BUILD_VERSIONED_SHLIB_GNU, test $enable_symvers = gnu) +AM_CONDITIONAL(LIBFFI_BUILD_VERSIONED_SHLIB_SUN, test $enable_symvers = sun) +AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) +]) |