re PR libffi/26048 (libffi doesn't build on Solaris 10/x86 with native assembler)

[thirdparty/gcc.git] / libffi / configure.ac

diff --git a/libffi/configure.ac b/libffi/configure.ac
index b99ebd7db65a4e4c08531aabe15c148c8c6e045f..2dff35c060f137285412af796b9e0d486b8b134e 100644 (file)
--- a/libffi/configure.ac
+++ b/libffi/configure.ac
@@ -240,6 +240,21 @@ if test x$TARGET = xSPARC; then
     fi
 fi
 
+if test x$TARGET = xX86 || test x$TARGET = xX86_64; then
+    AC_CACHE_CHECK([assembler supports pc related relocs],
+       libffi_cv_as_x86_pcrel, [
+       libffi_cv_as_x86_pcrel=yes
+       echo '.text; foo: nop; .data; .long foo-.; .text' > conftest.s
+       if $CC $CFLAGS -c conftest.s 2>&1 | grep -i warning > /dev/null; then
+           libffi_cv_as_x86_pcrel=no
+       fi
+       ])
+    if test "x$libffi_cv_as_x86_pcrel" = xyes; then
+       AC_DEFINE(HAVE_AS_X86_PCREL, 1,
+                 [Define if your assembler supports PC relative relocs.])
+    fi
+fi
+
 AC_CACHE_CHECK([whether .eh_frame section should be read-only],
     libffi_cv_ro_eh_frame, [
        libffi_cv_ro_eh_frame=no