SubmittingPatches: document how to reference previous commits

diff --git a/configure.ac b/configure.ac
index 5c1312f24a247fca9bdd7dc9d66aa05f8a7c60d5..c279025747349c19039b0e061954ae67b91b735a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -471,6 +471,13 @@ if test -n "$ASCIIDOC"; then
        esac
 fi
 
+if grep -a ascii configure.ac >/dev/null; then
+  AC_MSG_RESULT([Using 'grep -a' for sane_grep])
+  SANE_TEXT_GREP=-a
+else
+  SANE_TEXT_GREP=
+fi
+GIT_CONF_SUBST([SANE_TEXT_GREP])
 
 ## Checks for libraries.
 AC_MSG_NOTICE([CHECKS for libraries])
@@ -521,10 +528,33 @@ AC_CHECK_LIB([curl], [curl_global_init],
 [NO_CURL=],
 [NO_CURL=YesPlease])
 
+if test -z "${NO_CURL}" && test -z "${NO_OPENSSL}"; then
+
+AC_CHECK_LIB([curl], [Curl_ssl_init],
+[NEEDS_SSL_WITH_CURL=YesPlease],
+[NEEDS_SSL_WITH_CURL=])
+
+GIT_CONF_SUBST([NEEDS_SSL_WITH_CURL])
+
+fi
+
 GIT_UNSTASH_FLAGS($CURLDIR)
 
 GIT_CONF_SUBST([NO_CURL])
 
+if test -z "$NO_CURL"; then
+
+AC_CHECK_PROG([CURL_CONFIG], [curl-config],
+[curl-config],
+[no])
+
+if test $CURL_CONFIG != no; then
+    GIT_CONF_SUBST([CURL_CONFIG])
+fi
+
+fi
+
+
 #
 # Define NO_EXPAT if you do not have expat installed.  git-http-push is
 # not built, and you cannot push using http:// and https:// transports.
@@ -754,12 +784,18 @@ AC_CHECK_TYPES([struct itimerval],
 [#include <sys/time.h>])
 GIT_CONF_SUBST([NO_STRUCT_ITIMERVAL])
 #
-# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
-AC_CHECK_MEMBER(struct dirent.d_ino,
-[NO_D_INO_IN_DIRENT=],
-[NO_D_INO_IN_DIRENT=YesPlease],
-[#include <dirent.h>])
-GIT_CONF_SUBST([NO_D_INO_IN_DIRENT])
+# Define USE_ST_TIMESPEC=YesPlease when stat.st_mtimespec.tv_nsec exists.
+# Define NO_NSEC=YesPlease when neither stat.st_mtim.tv_nsec nor
+# stat.st_mtimespec.tv_nsec exists.
+AC_CHECK_MEMBER([struct stat.st_mtimespec.tv_nsec])
+AC_CHECK_MEMBER([struct stat.st_mtim.tv_nsec])
+if test x$ac_cv_member_struct_stat_st_mtimespec_tv_nsec = xyes; then
+       USE_ST_TIMESPEC=YesPlease
+       GIT_CONF_SUBST([USE_ST_TIMESPEC])
+elif test x$ac_cv_member_struct_stat_st_mtim_tv_nsec != xyes; then
+       NO_NSEC=YesPlease
+       GIT_CONF_SUBST([NO_NSEC])
+fi
 #
 # Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
 # d_type in struct dirent (latest Cygwin -- will be fixed soonish).
@@ -934,6 +970,28 @@ AC_CHECK_LIB([iconv], [locale_charset],
                      [CHARSET_LIB=-lcharset])])
 GIT_CONF_SUBST([CHARSET_LIB])
 #
+# Define HAVE_CLOCK_GETTIME=YesPlease if clock_gettime is available.
+GIT_CHECK_FUNC(clock_gettime,
+       [HAVE_CLOCK_GETTIME=YesPlease],
+       [HAVE_CLOCK_GETTIME=])
+GIT_CONF_SUBST([HAVE_CLOCK_GETTIME])
+
+AC_DEFUN([CLOCK_MONOTONIC_SRC], [
+AC_LANG_PROGRAM([[
+#include <time.h>
+clockid_t id = CLOCK_MONOTONIC;
+]])])
+
+#
+# Define HAVE_CLOCK_MONOTONIC=YesPlease if CLOCK_MONOTONIC is available.
+AC_MSG_CHECKING([for CLOCK_MONOTONIC])
+AC_COMPILE_IFELSE([CLOCK_MONOTONIC_SRC],
+       [AC_MSG_RESULT([yes])
+       HAVE_CLOCK_MONOTONIC=YesPlease],
+       [AC_MSG_RESULT([no])
+       HAVE_CLOCK_MONOTONIC=])
+GIT_CONF_SUBST([HAVE_CLOCK_MONOTONIC])
+#
 # Define NO_SETITIMER if you don't have setitimer.
 GIT_CHECK_FUNC(setitimer,
 [NO_SETITIMER=],
@@ -1002,11 +1060,40 @@ GIT_CHECK_FUNC(initgroups,
 [NO_INITGROUPS=YesPlease])
 GIT_CONF_SUBST([NO_INITGROUPS])
 #
+# Define HAVE_GETDELIM if you have getdelim in the C library.
+GIT_CHECK_FUNC(getdelim,
+[HAVE_GETDELIM=YesPlease],
+[HAVE_GETDELIM=])
+GIT_CONF_SUBST([HAVE_GETDELIM])
+#
 #
 # Define NO_MMAP if you want to avoid mmap.
 #
 # Define NO_ICONV if your libc does not properly support iconv.
 
+AC_DEFUN([BSD_SYSCTL_SRC], [
+AC_LANG_PROGRAM([[
+#include <stddef.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+]],[[
+int val, mib[2];
+size_t len;
+mib[0] = CTL_HW;
+mib[1] = 1;
+len = sizeof(val);
+return sysctl(mib, 2, &val, &len, NULL, 0) ? 1 : 0;
+]])])
+
+#
+# Define HAVE_BSD_SYSCTL=YesPlease if a BSD-compatible sysctl function is available.
+AC_MSG_CHECKING([for BSD sysctl])
+AC_COMPILE_IFELSE([BSD_SYSCTL_SRC],
+       [AC_MSG_RESULT([yes])
+       HAVE_BSD_SYSCTL=YesPlease],
+       [AC_MSG_RESULT([no])
+       HAVE_BSD_SYSCTL=])
+GIT_CONF_SUBST([HAVE_BSD_SYSCTL])
 
 ## Other checks.
 # Define USE_PIC if you need the main git objects to be built with -fPIC
@@ -1058,7 +1145,12 @@ elif test -z "$PTHREAD_CFLAGS"; then
   # would then trigger compiler warnings on every single file we compile.
   for opt in "" -mt -pthread -lpthread; do
      old_CFLAGS="$CFLAGS"
-     CFLAGS="$opt $CFLAGS"
+     old_LIBS="$LIBS"
+     case "$opt" in
+        -l*)  LIBS="$opt $LIBS" ;;
+        *)    CFLAGS="$opt $CFLAGS" ;;
+     esac
+
      AC_MSG_CHECKING([for POSIX Threads with '$opt'])
      AC_LINK_IFELSE([PTHREADTEST_SRC],
        [AC_MSG_RESULT([yes])
@@ -1070,6 +1162,7 @@ elif test -z "$PTHREAD_CFLAGS"; then
        ],
        [AC_MSG_RESULT([no])])
       CFLAGS="$old_CFLAGS"
+      LIBS="$old_LIBS"
   done
   if test $threads_found != yes; then
     AC_CHECK_LIB([pthread], [pthread_create],