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47 lines
1.6 KiB
Plaintext
47 lines
1.6 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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AC_CACHE_CHECK([whether the CFI directive .cfi_sections is supported],
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[libc_cv_asm_cfi_directive_sections],
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[cat > conftest.s <<EOF
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.text
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.cfi_sections .debug_frame, .eh_frame
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.cfi_startproc
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.cfi_endproc
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EOF
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if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
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libc_cv_asm_cfi_directive_sections=yes
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else
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libc_cv_asm_cfi_directive_sections=no
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fi
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rm -f conftest*])
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if test $libc_cv_asm_cfi_directive_sections != yes; then
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AC_MSG_ERROR([need .cfi_sections in this configuration])
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fi
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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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