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| author | Jan Kratochvil <jan.kratochvil@redhat.com> | 2013-05-30 14:37:38 +0200 |
|---|---|---|
| committer | Jan Kratochvil <jan.kratochvil@redhat.com> | 2013-11-07 21:39:00 +0100 |
| commit | 0b867460075c9f02cb305abc91a0e12b90017583 (patch) | |
| tree | 28f799db9b0eef70d0b4b5e81163b2fc62903470 /m4 | |
| parent | 22f867adcc1258aeb88560fa8591ef071353bb22 (diff) | |
Unwinder for x86*.
Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Signed-off-by: Mark Wielaard <mjw@redhat.com>
Diffstat (limited to 'm4')
| -rw-r--r-- | m4/ChangeLog | 4 | ||||
| -rw-r--r-- | m4/biarch.m4 | 45 |
2 files changed, 49 insertions, 0 deletions
diff --git a/m4/ChangeLog b/m4/ChangeLog index f82b0ca7..98de943b 100644 --- a/m4/ChangeLog +++ b/m4/ChangeLog @@ -1,3 +1,7 @@ +2013-11-07 Jan Kratochvil <jan.kratochvil@redhat.com> + + * biarch.m4: New file. + 2013-04-24 Mark Wielaard <mjw@redhat.com> * gettext.m4: Upgrade to gettext-0.18.2. diff --git a/m4/biarch.m4 b/m4/biarch.m4 new file mode 100644 index 00000000..a15323e2 --- /dev/null +++ b/m4/biarch.m4 @@ -0,0 +1,45 @@ +AC_DEFUN([utrace_CC_m32], [dnl +AC_CACHE_CHECK([$CC option for 32-bit word size], utrace_cv_CC_m32, [dnl +save_CC="$CC" +utrace_cv_CC_m32=none +for ut_try in -m32 -m31; do + [CC=`echo "$save_CC" | sed 's/ -m[36][241]//'`" $ut_try"] + AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int foo (void) { return 1; }]])], + [utrace_cv_CC_m32=$ut_try]) + test x$utrace_cv_CC_m32 = xnone || break +done +CC="$save_CC"])]) + +AC_DEFUN([utrace_HOST64], [AC_REQUIRE([utrace_CC_m32]) +AS_IF([test x$utrace_cv_CC_m32 != xnone], [dnl +AC_CACHE_CHECK([for 64-bit host], utrace_cv_host64, [dnl +AC_EGREP_CPP([@utrace_host64@], [#include <stdint.h> +#if (UINTPTR_MAX > 0xffffffffUL) +@utrace_host64@ +#endif], + utrace_cv_host64=yes, utrace_cv_host64=no)]) +AS_IF([test $utrace_cv_host64 = no], + [utrace_biarch=-m64 utrace_thisarch=$utrace_cv_CC_m32], + [utrace_biarch=$utrace_cv_CC_m32 utrace_thisarch=-m64]) + +biarch_CC=`echo "$CC" | sed "s/ *${utrace_thisarch}//"` +biarch_CC="$biarch_CC $utrace_biarch"])]) + +AC_DEFUN([utrace_BIARCH], [AC_REQUIRE([utrace_HOST64]) +utrace_biarch_forced=no +AC_ARG_WITH([biarch], + AC_HELP_STRING([--with-biarch], + [enable biarch tests despite build problems]), + [AS_IF([test "x$with_biarch" != xno], [utrace_biarch_forced=yes])]) +AS_IF([test $utrace_biarch_forced = yes], [dnl +utrace_cv_cc_biarch=yes +AC_MSG_NOTICE([enabling biarch tests regardless using $biarch_CC])], [dnl +AS_IF([test x$utrace_cv_CC_m32 != xnone], [dnl +AC_CACHE_CHECK([whether $biarch_CC makes executables we can run], + utrace_cv_cc_biarch, [dnl +save_CC="$CC" +CC="$biarch_CC" +AC_RUN_IFELSE([AC_LANG_PROGRAM([], [])], + utrace_cv_cc_biarch=yes, utrace_cv_cc_biarch=no) +CC="$save_CC"])], [utrace_cv_cc_biarch=no])]) +AM_CONDITIONAL(BIARCH, [test $utrace_cv_cc_biarch = yes])]) |