From 768bcd1da3fdc02fbfa374b4ec25994931207177 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se>
Date: Wed, 5 Oct 2005 23:16:45 +0200
Subject: [PATCH] * configure.ac (NM): Use AC_CHECK_TOOL to check for nm.
(ASM_SYMBOL_PREFIX): Use $NM when examining the object file. (ASM_ELF_STYLE):
New variable. Set to 'yes' if assembling a file with ELF-style .type and
.size pseudo ops works.
Rev: src/nettle/configure.ac:1.59
---
configure.ac | 33 +++++++++++++++++++++++++++++++--
1 file changed, 31 insertions(+), 2 deletions(-)
diff --git a/configure.ac b/configure.ac
index 705d0afe..e5776f41 100644
--- a/configure.ac
+++ b/configure.ac
@@ -77,6 +77,7 @@ fi
AC_PROG_MAKE_SET
AC_PROG_RANLIB
+AC_CHECK_TOOL(NM, nm, strings)
if test "x$ac_cv_prog_cc_stdc" = xno ; then
AC_ERROR([the C compiler doesn't handle ANSI-C])
@@ -171,6 +172,7 @@ fi
AC_SUBST([CCPIC_MAYBE])
ASM_SYMBOL_PREFIX=''
+ASM_ELF_STYLE='no'
if test x$enable_assembler = xyes ; then
AC_CACHE_CHECK([if globals are prefixed by underscore],
@@ -179,7 +181,7 @@ if test x$enable_assembler = xyes ; then
nettle_cv_asm_underscore=no
AC_COMPILE_IFELSE(
[int a_global_symbol;],
- [ nm conftest.$OBJEXT >conftest.out
+ [ $NM conftest.$OBJEXT >conftest.out
if grep _a_global_symbol conftest.out >/dev/null ; then
nettle_cv_asm_underscore=yes
elif grep a_global_symbol conftest.out >/dev/null ; then
@@ -190,10 +192,37 @@ if test x$enable_assembler = xyes ; then
[AC_MSG_WARN([test program with a single global could not be compiled!?])])])
if test x$nettle_cv_asm_underscore = xyes ; then
ASM_SYMBOL_PREFIX='_'
- fi
+ fi
+ # With inspiration from GMP_TRY_ASSEMBLE
+ AC_CACHE_CHECK([for ELF-style pseudo-ops],
+ nettle_cv_asm_elf_style_pseudo_ops,
+ [cat >conftest.s <<EOF
+.text
+.globl foo
+.type foo @function
+foo:
+.Lend:
+
+.size foo, .Lend - foo
+EOF
+ nettle_assemble="$CC $CFLAGS $CPPFLAGS -c conftest.s >conftest.out 2>&1"
+ if AC_TRY_EVAL(nettle_assemble); then
+ cat conftest.out >&AC_FD_CC
+ nettle_cv_asm_elf_style_pseudo_ops=yes
+ else
+ cat conftest.out >&AC_FD_CC
+ echo "configure: failed program was:" >&AC_FD_CC
+ cat conftest.s >&AC_FD_CC
+ nettle_cv_asm_elf_style_pseudo_ops=no
+ fi
+ rm -f conftest.*])
+ if test x$nettle_cv_asm_elf_style_pseudo_ops = xyes ; then
+ ASM_ELF_STYLE='yes'
+ fi
fi
AC_SUBST(ASM_SYMBOL_PREFIX)
+AC_SUBST(ASM_ELF_STYLE)
AC_SUBST(SHLIBCFLAGS)
AC_SUBST(SHLIBMAJOR)
--
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