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| author | Stefan Krah <skrah@bytereef.org> | 2015-07-02 18:27:56 (GMT) |
|---|---|---|
| committer | Stefan Krah <skrah@bytereef.org> | 2015-07-02 18:27:56 (GMT) |
| commit | e31db2a8214e338be8873a92f7c40c94a56c7078 (patch) | |
| tree | 149982a81ee355db66cc05eac3282b5a03ea53c1 | |
| parent | 49c521fd5d3102916045551019368eae66dc7696 (diff) | |
| download | cpython-e31db2a8214e338be8873a92f7c40c94a56c7078.zip cpython-e31db2a8214e338be8873a92f7c40c94a56c7078.tar.gz cpython-e31db2a8214e338be8873a92f7c40c94a56c7078.tar.bz2 | |
Issue #24543: Use AC_LINK instead of AC_COMPILE in order to prevent false
positives with the -flto option (gcc >= 4.9.0 and clang).
| -rwxr-xr-x | configure | 15 | ||||
| -rw-r--r-- | configure.ac | 6 |
2 files changed, 12 insertions, 9 deletions
@@ -13397,12 +13397,13 @@ main () return 0; } _ACEOF -if ac_fn_c_try_compile "$LINENO"; then : +if ac_fn_c_try_link "$LINENO"; then : have_gcc_asm_for_x64=yes else have_gcc_asm_for_x64=no fi -rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext { $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_gcc_asm_for_x64" >&5 $as_echo "$have_gcc_asm_for_x64" >&6; } if test "$have_gcc_asm_for_x64" = yes @@ -13573,12 +13574,13 @@ main () return 0; } _ACEOF -if ac_fn_c_try_compile "$LINENO"; then : +if ac_fn_c_try_link "$LINENO"; then : have_gcc_asm_for_x87=yes else have_gcc_asm_for_x87=no fi -rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext { $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_gcc_asm_for_x87" >&5 $as_echo "$have_gcc_asm_for_x87" >&6; } if test "$have_gcc_asm_for_x87" = yes @@ -13605,12 +13607,13 @@ main () return 0; } _ACEOF -if ac_fn_c_try_compile "$LINENO"; then : +if ac_fn_c_try_link "$LINENO"; then : have_gcc_asm_for_mc68881=yes else have_gcc_asm_for_mc68881=no fi -rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext { $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_gcc_asm_for_mc68881" >&5 $as_echo "$have_gcc_asm_for_mc68881" >&6; } if test "$have_gcc_asm_for_mc68881" = yes diff --git a/configure.ac b/configure.ac index 4030e33..56a73df 100644 --- a/configure.ac +++ b/configure.ac @@ -3910,7 +3910,7 @@ fi], # ************************************** AC_MSG_CHECKING(for x64 gcc inline assembler) -AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ +AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[ __asm__ __volatile__ ("movq %rcx, %rax"); ]])],[have_gcc_asm_for_x64=yes],[have_gcc_asm_for_x64=no]) AC_MSG_RESULT($have_gcc_asm_for_x64) @@ -4008,7 +4008,7 @@ fi # so we try it on all platforms. AC_MSG_CHECKING(whether we can use gcc inline assembler to get and set x87 control word) -AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ +AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[ unsigned short cw; __asm__ __volatile__ ("fnstcw %0" : "=m" (cw)); __asm__ __volatile__ ("fldcw %0" : : "m" (cw)); @@ -4021,7 +4021,7 @@ then fi AC_MSG_CHECKING(whether we can use gcc inline assembler to get and set mc68881 fpcr) -AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ +AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[ unsigned int fpcr; __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=g" (fpcr)); __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "g" (fpcr)); |