autoconf: Checks for some library functions.

diff --git a/builtin-rev-parse.c b/builtin-rev-parse.c
index c353a481b0c8590689c38b46525dc3217b15efbe..5f5ade45aec781df107d4a49a4a554575ac278bd 100644 (file)
--- a/builtin-rev-parse.c
+++ b/builtin-rev-parse.c
@@ -15,7 +15,7 @@
 #define DO_NONFLAGS    8
 static int filter = ~0;
 
-static char *def = NULL;
+static const char *def = NULL;
 
 #define NORMAL 0
 #define REVERSED 1
@@ -111,7 +111,7 @@ static void show_rev(int type, const unsigned char *sha1, const char *name)
 }
 
 /* Output a flag, only if filter allows it. */
-static int show_flag(char *arg)
+static int show_flag(const char *arg)
 {
        if (!(filter & DO_FLAGS))
                return 0;
@@ -124,7 +124,7 @@ static int show_flag(char *arg)
 
 static void show_default(void)
 {
-       char *s = def;
+       const char *s = def;
 
        if (s) {
                unsigned char sha1[20];
@@ -173,7 +173,7 @@ int cmd_rev_parse(int argc, const char **argv, char **envp)
        git_config(git_default_config);
 
        for (i = 1; i < argc; i++) {
-               char *arg = argv[i];
+               const char *arg = argv[i];
                char *dotdot;
 
                if (as_is) {
@@ -329,8 +329,8 @@ int cmd_rev_parse(int argc, const char **argv, char **envp)
                dotdot = strstr(arg, "..");
                if (dotdot) {
                        unsigned char end[20];
-                       char *next = dotdot + 2;
-                       char *this = arg;
+                       const char *next = dotdot + 2;
+                       const char *this = arg;
                        *dotdot = 0;
                        if (!*next)
                                next = "HEAD";