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| author | Jim Meyering <meyering@vm.meyering.net.localdomain> | 2009-10-15 20:54:02 +0200 |
|---|---|---|
| committer | Jim Meyering <meyering@redhat.com> | 2009-10-15 21:03:40 +0200 |
| commit | 2fa407885c5fbcbcf92ef640859440b896d3c6b1 (patch) | |
| tree | 3129eb3b52d800dbf02386cb2f361771797d0423 /m4/jm-macros.m4 | |
| parent | b3cfa712ca5c28ad755f4a85147b32538766a417 (diff) | |
| download | coreutils-2fa407885c5fbcbcf92ef640859440b896d3c6b1.tar.xz | |
build: don't let environment settings perturb build
Setting the envvars, LIB_FDATASYNC, LIB_XATTR or LIB_CRYPT
could cause a configure-time and/or build-time malfunction.
Typically, a configure-time function-in-library test is performed
via code like this:
LIB_VAR=
AC_SUBST([LIB_VAR])
prefix_saved_LIBS=$LIBS
AC_SEARCH_LIBS([FUNC], [LIB_NAME],
[test "$ac_cv_search_FUNC" = "none required" ||
LIB_VAR=$ac_cv_search_FUNC])
LIBS=$prefix_saved_LIBS
However, in each of the files affected by this change, the LIB_VAR=
initialization was omitted. Thus, when set in the environment, its
value would propagate into generated Makefiles when FUNC is not found
in LIB_NAME.
* m4/jm-macros.m4 (coreutils_MACROS): Initialize AC_SUBST'd var
* m4/lib-check.m4 (cu_LIB_CHECK): Likewise.
* m4/xattr.m4 (gl_FUNC_XATTR): Likewise.
Diffstat (limited to 'm4/jm-macros.m4')
| -rw-r--r-- | m4/jm-macros.m4 | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4 index 833940469..f42f67c21 100644 --- a/m4/jm-macros.m4 +++ b/m4/jm-macros.m4 @@ -94,6 +94,7 @@ AC_DEFUN([coreutils_MACROS], # for dd.c and shred.c coreutils_saved_libs=$LIBS + LIB_FDATASYNC= AC_SEARCH_LIBS([fdatasync], [rt posix4], [test "$ac_cv_search_fdatasync" = "none required" || LIB_FDATASYNC=$ac_cv_search_fdatasync]) |