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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a few weeks before binutils 2.20 was released; it's in 2.20, the minimum supported version, so even that configure test is obsolete.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.
42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/arm.
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dnl It is always possible to access static and hidden symbols in an
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dnl position independent way.
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dnl NOTE: This feature was added by the GCC TLS patches. We should test for
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dnl it. Until we do, don't define it.
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#AC_DEFINE(PI_STATIC_AND_HIDDEN)
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# We check to see if the compiler and flags are
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# selecting the hard-float ABI and if they are then
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# we set libc_cv_arm_pcs_vfp to yes which causes
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# HAVE_ARM_PCS_VFP to be defined in config.h and
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# in include/libc-symbols.h and thus available to
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# shlib-versions to select the appropriate name for
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# the dynamic linker via %ifdef.
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AC_CACHE_CHECK([whether the compiler is using the ARM hard-float ABI],
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[libc_cv_arm_pcs_vfp],
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[AC_EGREP_CPP(yes,[#ifdef __ARM_PCS_VFP
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yes
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#endif
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], libc_cv_arm_pcs_vfp=yes, libc_cv_arm_pcs_vfp=no)])
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if test $libc_cv_arm_pcs_vfp = yes; then
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AC_DEFINE(HAVE_ARM_PCS_VFP)
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LIBC_CONFIG_VAR([default-abi], [hard])
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else
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LIBC_CONFIG_VAR([default-abi], [soft])
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fi
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AC_CACHE_CHECK([whether the build tools support the GNU descriptor TLS scheme],
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[libc_cv_arm_tls_desc],
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[old_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -mtls-dialect=gnu2"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([asm (".word\tfoo(tlsdesc)");], [])],
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[libc_cv_arm_tls_desc=yes], [libc_cv_arm_tls_desc=no])
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CFLAGS="$old_CFLAGS"])
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if test $libc_cv_arm_tls_desc = yes; then
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LIBC_CONFIG_VAR([have-arm-tls-desc], [yes])
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else
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LIBC_CONFIG_VAR([have-arm-tls-desc], [no])
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fi
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