(jm_PREREQ_HUMAN): New macro.

[gnulib.git] / m4 / jm-macros.m4

diff --git a/m4/jm-macros.m4 b/m4/jm-macros.m4
index 2ed57dc..41130aa 100644 (file)
--- a/m4/jm-macros.m4
+++ b/m4/jm-macros.m4
@@ -1,4 +1,4 @@
-#serial 14
+#serial 17
 
 dnl Misc type-related macros for fileutils, sh-utils, textutils.
 
@@ -70,6 +70,7 @@ AC_DEFUN(jm_MACROS,
   AC_REQUIRE([jm_PREREQ])
 
   AC_REQUIRE([jm_FUNC_LCHOWN])
+  AC_REQUIRE([fetish_FUNC_RMDIR_NOTEMPTY])
   AC_REQUIRE([jm_FUNC_CHOWN])
   AC_REQUIRE([jm_FUNC_MKTIME])
   AC_REQUIRE([jm_FUNC_LSTAT])
@@ -107,6 +108,8 @@ AC_DEFUN(jm_MACROS,
   AC_REPLACE_FUNCS(stime strcspn stpcpy strstr strtol strtoul)
   AC_REPLACE_FUNCS(strpbrk)
   AC_REPLACE_FUNCS(euidaccess memcmp mkdir rmdir rpmatch strndup strverscmp)
+  AC_REPLACE_FUNCS(atexit)
+  AC_REPLACE_FUNCS(strnlen)
 
   dnl used by e.g. intl/*domain.c and lib/canon-host.c
   AC_REPLACE_FUNCS(strdup)
@@ -128,8 +131,16 @@ AC_DEFUN(jm_MACROS,
   # used by sleep and shred
   # Solaris 2.5.1 needs -lposix4 to get the clock_gettime function.
   # Solaris 7 prefers the library name -lrt to the obsolescent name -lposix4.
-  AC_SEARCH_LIBS(clock_gettime, [rt posix4])
-  AC_CHECK_FUNCS(clock_gettime)
+
+  # Save and restore LIBS so e.g., -lrt, isn't added to it.  Otherwise, *all*
+  # programs in the package would end up linked with that potentially-shared
+  # library, inducing unnecessary run-time overhead.
+  fetish_saved_libs=$LIBS
+    AC_SEARCH_LIBS(clock_gettime, [rt posix4],
+                  [LIB_CLOCK_GETTIME=$ac_cv_search_clock_gettime])
+    AC_SUBST(LIB_CLOCK_GETTIME)
+    AC_CHECK_FUNCS(clock_gettime)
+  LIBS=$fetish_saved_libs
   AC_CHECK_FUNCS(gettimeofday)
 
   AC_REQUIRE([AC_FUNC_CLOSEDIR_VOID])
@@ -192,8 +203,25 @@ AC_DEFUN(jm_MACROS,
 
 ])
 
+# This macro must be invoked before any tests that run the compiler.
 AC_DEFUN(jm_CHECK_ALL_TYPES,
 [
+  # Emit this code into config.h.in.
+  # The ifndef is to avoid redefinition warnings.
+  AH_VERBATIM([_GNU_SOURCE], [#ifndef _GNU_SOURCE
+# define _GNU_SOURCE
+#endif])
+
+  dnl This test must come as early as possible after the compiler configuration
+  dnl tests, because the choice of the file model can (in principle) affect
+  dnl whether functions and headers are available, whether they work, etc.
+  AC_REQUIRE([AC_SYS_LARGEFILE])
+
+  dnl This test must precede tests of compiler characteristics like
+  dnl that for the inline keyword, since it may change the degree to
+  dnl which the compiler supports such features.
+  AC_REQUIRE([AM_C_PROTOTYPES])
+
   dnl Checks for typedefs, structures, and compiler characteristics.
   AC_REQUIRE([AC_C_BIGENDIAN])
   AC_REQUIRE([AC_PROG_CC_STDC])