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-rw-r--r--sysdeps/arm/configure.ac46
1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/arm/configure.ac b/sysdeps/arm/configure.ac
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+++ b/sysdeps/arm/configure.ac
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+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# Local configure fragment for sysdeps/arm.
+
+dnl It is always possible to access static and hidden symbols in an
+dnl position independent way.
+dnl NOTE: This feature was added by the GCC TLS patches. We should test for
+dnl it. Until we do, don't define it.
+#AC_DEFINE(PI_STATIC_AND_HIDDEN)
+
+AC_CACHE_CHECK([whether the CFI directive .cfi_sections is supported],
+ [libc_cv_asm_cfi_directive_sections],
+ [cat > conftest.s <<EOF
+ .text
+ .cfi_sections .debug_frame, .eh_frame
+ .cfi_startproc
+ .cfi_endproc
+EOF
+ if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then
+ libc_cv_asm_cfi_directive_sections=yes
+ else
+ libc_cv_asm_cfi_directive_sections=no
+ fi
+ rm -f conftest*])
+if test $libc_cv_asm_cfi_directive_sections != yes; then
+ AC_MSG_ERROR([need .cfi_sections in this configuration])
+fi
+
+# We check to see if the compiler and flags are
+# selecting the hard-float ABI and if they are then
+# we set libc_cv_arm_pcs_vfp to yes which causes
+# HAVE_ARM_PCS_VFP to be defined in config.h and
+# in include/libc-symbols.h and thus available to
+# shlib-versions to select the appropriate name for
+# the dynamic linker via %ifdef.
+AC_CACHE_CHECK([whether the compiler is using the ARM hard-float ABI],
+ [libc_cv_arm_pcs_vfp],
+ [AC_EGREP_CPP(yes,[#ifdef __ARM_PCS_VFP
+ yes
+ #endif
+ ], libc_cv_arm_pcs_vfp=yes, libc_cv_arm_pcs_vfp=no)])
+if test $libc_cv_arm_pcs_vfp = yes; then
+ AC_DEFINE(HAVE_ARM_PCS_VFP)
+ LIBC_CONFIG_VAR([default-abi], [hard])
+else
+ LIBC_CONFIG_VAR([default-abi], [soft])
+fi