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a8779c28a8
This patch removes configure tests for assembler CFI support (and thereby eliminates an architecture-specific case in the main configure.ac), instead assuming that support is present unconditionally. The main test was added in 2003 around the time CFI support was added to the assembler. cfi_personality and cfi_lsda support were added to the assembler in 2006. cfi_sections support was added in 2009, a few weeks before binutils 2.20 was released; it's in 2.20, the minimum supported version, so even that configure test is obsolete. Tested x86_64 that the installed shared libraries are unchanged by this patch. * configure.ac (libc_cv_asm_cfi_directives): Remove configure test. * configure: Regenerated. * config.h.in (HAVE_ASM_CFI_DIRECTIVES): Remove macro undefine. * sysdeps/arm/configure.ac (libc_cv_asm_cfi_directive_sections): Remove configure test. * sysdeps/arm/configure: Regenerated. * sysdeps/nptl/configure.ac: Do not check libc_cv_asm_cfi_directives. * sysdeps/nptl/configure: Regenerated. * sysdeps/x86_64/nptl/configure.ac: Remove file. * sysdeps/x86_64/nptl/configure: Remove generated file. * b/sysdeps/generic/sysdep.h [HAVE_ASM_CFI_DIRECTIVES]: Make code unconditional. [!HAVE_ASM_CFI_DIRECTIVES]: Remove conditional code.
82 lines
2.2 KiB
Plaintext
82 lines
2.2 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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if test "x$libc_cv_gcc___thread" != xyes; then
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as_fn_error $? "compiler support for __thread is required" "$LINENO" 5
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fi
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if test "x${libc_cv_visibility_attribute}" != xyes ||
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test "x${libc_cv_broken_visibility_attribute}" != xno; then
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as_fn_error $? "working compiler support for visibility attribute is required" "$LINENO" 5
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for forced unwind support" >&5
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$as_echo_n "checking for forced unwind support... " >&6; }
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if ${libc_cv_forced_unwind+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <unwind.h>
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int
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main ()
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{
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struct _Unwind_Exception exc;
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struct _Unwind_Context *context;
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_Unwind_GetCFA (context)
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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libc_cv_forced_unwind=yes
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else
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libc_cv_forced_unwind=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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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_forced_unwind" >&5
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$as_echo "$libc_cv_forced_unwind" >&6; }
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if test $libc_cv_forced_unwind = yes; then
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$as_echo "#define HAVE_FORCED_UNWIND 1" >>confdefs.h
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old_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror -fexceptions"
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for C cleanup handling" >&5
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$as_echo_n "checking for C cleanup handling... " >&6; }
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if ${libc_cv_c_cleanup+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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extern void some_function (void);
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void cl (void *a) { }
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int
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main ()
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{
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int a __attribute__ ((cleanup (cl)));
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some_function ()
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_compile "$LINENO"; then :
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libc_cv_c_cleanup=yes
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else
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libc_cv_c_cleanup=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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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_c_cleanup" >&5
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$as_echo "$libc_cv_c_cleanup" >&6; }
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CFLAGS="$old_CFLAGS"
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if test $libc_cv_c_cleanup = no; then
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as_fn_error $? "the compiler must support C cleanup handling" "$LINENO" 5
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fi
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else
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as_fn_error $? "forced unwind support is required" "$LINENO" 5
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fi
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