add NO_EXTERNAL_GREP build option

[thirdparty/git.git] / Makefile

diff --git a/Makefile b/Makefile
index e3eaa6a543e7c3eed8a72c00f8b5541524fc9508..bc46fd44f5b36efe48f43a00631f3a86b924264c 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -148,6 +148,9 @@ all::
 # is a simplified version of the merge sort used in glibc. This is
 # recommended if Git triggers O(n^2) behavior in your platform's qsort().
 #
+# Define NO_EXTERNAL_GREP if you don't want "git grep" to ever call
+# your external grep (e.g., if your system lacks grep, if its grep is
+# broken, or spawning external process is slower than built-in grep git has).
 
 GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
        @$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -760,6 +763,9 @@ endif
 ifdef DIR_HAS_BSD_GROUP_SEMANTICS
        COMPAT_CFLAGS += -DDIR_HAS_BSD_GROUP_SEMANTICS
 endif
+ifdef NO_EXTERNAL_GREP
+       BASIC_CFLAGS += -DNO_EXTERNAL_GREP
+endif
 
 ifeq ($(TCLTK_PATH),)
 NO_TCLTK=NoThanks