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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).
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15
configure
vendored
15
configure
vendored
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@ -13397,12 +13397,13 @@ main ()
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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if ac_fn_c_try_link "$LINENO"; then :
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have_gcc_asm_for_x64=yes
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else
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have_gcc_asm_for_x64=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_gcc_asm_for_x64" >&5
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$as_echo "$have_gcc_asm_for_x64" >&6; }
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if test "$have_gcc_asm_for_x64" = yes
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@ -13573,12 +13574,13 @@ main ()
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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if ac_fn_c_try_link "$LINENO"; then :
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have_gcc_asm_for_x87=yes
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else
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have_gcc_asm_for_x87=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_gcc_asm_for_x87" >&5
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$as_echo "$have_gcc_asm_for_x87" >&6; }
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if test "$have_gcc_asm_for_x87" = yes
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@ -13605,12 +13607,13 @@ main ()
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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if ac_fn_c_try_link "$LINENO"; then :
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have_gcc_asm_for_mc68881=yes
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else
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have_gcc_asm_for_mc68881=no
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fi
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rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_gcc_asm_for_mc68881" >&5
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$as_echo "$have_gcc_asm_for_mc68881" >&6; }
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if test "$have_gcc_asm_for_mc68881" = yes
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@ -3910,7 +3910,7 @@ fi],
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# **************************************
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AC_MSG_CHECKING(for x64 gcc inline assembler)
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
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AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[
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__asm__ __volatile__ ("movq %rcx, %rax");
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]])],[have_gcc_asm_for_x64=yes],[have_gcc_asm_for_x64=no])
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AC_MSG_RESULT($have_gcc_asm_for_x64)
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@ -4008,7 +4008,7 @@ fi
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# so we try it on all platforms.
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AC_MSG_CHECKING(whether we can use gcc inline assembler to get and set x87 control word)
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
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AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[
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unsigned short cw;
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__asm__ __volatile__ ("fnstcw %0" : "=m" (cw));
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__asm__ __volatile__ ("fldcw %0" : : "m" (cw));
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@ -4021,7 +4021,7 @@ then
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fi
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AC_MSG_CHECKING(whether we can use gcc inline assembler to get and set mc68881 fpcr)
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
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AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[
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unsigned int fpcr;
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__asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=g" (fpcr));
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__asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "g" (fpcr));
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