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| author | kcook <kcook@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-08-12 22:35:22 +0000 |
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| committer | kcook <kcook@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-08-12 22:35:22 +0000 |
| commit | 8fea036f5a3c87749a5604d695c1f07891d9bde9 (patch) | |
| tree | 6c5aa4b2b905b67311a369a7b7b55d265ed4e28f /gcc/aclocal.m4 | |
| parent | 8172be2250c74e18eb090963103ca829b5270272 (diff) | |
| download | gcc-8fea036f5a3c87749a5604d695c1f07891d9bde9.tar.gz | |
2003-08-08 Kelley Cook <kelleycook@wideopenwest.com>
* configure.in (make_compare_target): Move test to ...
* aclocal.m4 (gcc_AC_PROG_CMP_IGNORE_INITIAL): here.
* configure: Regenerate.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@70392 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/aclocal.m4')
| -rw-r--r-- | gcc/aclocal.m4 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/aclocal.m4 b/gcc/aclocal.m4 index ebdb5b28007..d772ee91f5b 100644 --- a/gcc/aclocal.m4 +++ b/gcc/aclocal.m4 @@ -101,6 +101,29 @@ if test x = y ; then fi ]) +dnl 'make compare' can be significantly faster, if cmp itself can +dnl skip bytes instead of using tail. The test being performed is +dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2" +dnl but we need to sink errors and handle broken shells. +AC_DEFUN(gcc_AC_PROG_CMP_IGNORE_INITIAL, +[AC_CACHE_CHECK([for cmp's capabilities], gcc_cv_prog_cmp_skip, +[ echo abfoo >t1 + echo cdfoo >t2 + if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then + if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then + gcc_cv_prog_cmp_skip=slowcompare + else + gcc_cv_prog_cmp_skip=gnucompare + fi + else + gcc_cv_prog_cmp_skip=slowcompare + fi + rm t1 t2 +]) +make_compare_target=$gcc_cv_prog_cmp_skip +AC_SUBST(make_compare_target) +]) + dnl See if the printf functions in libc support %p in format strings. AC_DEFUN(gcc_AC_FUNC_PRINTF_PTR, [AC_CACHE_CHECK(whether the printf functions support %p, |