SubmittingPatches: document how to reference previous commits

diff --git a/configure.ac b/configure.ac
index 76170ad06d1e8a591af209b91c622d3073c691dd..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])
@@ -963,10 +970,6 @@ AC_CHECK_LIB([iconv], [locale_charset],
                      [CHARSET_LIB=-lcharset])])
 GIT_CONF_SUBST([CHARSET_LIB])
 #
-# Define NO_HMAC_CTX_CLEANUP=YesPlease if HMAC_CTX_cleanup is missing.
-AC_CHECK_LIB([crypto], [HMAC_CTX_cleanup],
-       [], [GIT_CONF_SUBST([NO_HMAC_CTX_CLEANUP], [YesPlease])])
-#
 # Define HAVE_CLOCK_GETTIME=YesPlease if clock_gettime is available.
 GIT_CHECK_FUNC(clock_gettime,
        [HAVE_CLOCK_GETTIME=YesPlease],
@@ -1142,7 +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])
@@ -1154,6 +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],