From: Simon Tatham <anakin@pobox.com>
Date: Sat, 21 Jan 2017 14:57:31 +0000 (+0000)
Subject: Conditionalise the automake git-commit embedding.
X-Git-Tag: 0.68~82
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=19aefec3e8b33f12e6edbead1028c07b5f486ce0;p=PuTTY.git

Conditionalise the automake git-commit embedding.

This arranges that the mechanism from the previous commit
automatically turns itself on and off depending on whether a .git
directory even exists (so it won't try to do anything in distribution
tarballs), and also arranges that it can be manually turned off by a
configure option (in case someone who _is_ building from a git
checkout finds it inconvenient for some reason I haven't thought of,
which seems quite plausible to me).
---

diff --git a/Recipe b/Recipe
index 952373f2..3b2db901 100644
--- a/Recipe
+++ b/Recipe
@@ -134,13 +134,15 @@
 # ------------------------------------------------------------
 # Additional text added verbatim to each individual Makefile.
 
-!cflags am version -DSOURCE_COMMIT=\"`git rev-parse HEAD 2>/dev/null`\"
+!cflags am version
 !begin am
+if AUTO_GIT_COMMIT
 BUILT_SOURCES = empty.h
 CLEANFILES = empty.h
+libversion_a_CFLAGS += -DSOURCE_COMMIT=\"`git --git-dir=$(srcdir)/.git rev-parse HEAD 2>/dev/null`\"
 empty.h: $(allsources)
 	echo '/* Empty file touched by automake makefile to force rebuild of version.o */' >$@
-
+endif
 !end
 !begin >empty.h
 /* Empty file touched by automake makefile to force rebuild of version.o */
diff --git a/configure.ac b/configure.ac
index e951a286..adb31915 100644
--- a/configure.ac
+++ b/configure.ac
@@ -42,6 +42,18 @@ AS_IF([test "x$setidtype" = "xsetgid"],
 AC_SUBST(SETID_CMD)
 AC_SUBST(SETID_MODE)
 
+AC_ARG_ENABLE([git-commit],
+  [AS_HELP_STRING([--disable-git-commit],
+                  [disable embedding current git HEAD in binaries])],
+  [],
+  [if test -d "$srcdir/.git"; then
+    enable_git_commit=yes; else enable_git_commit=no; fi])
+
+if test "x$enable_git_commit" = "xyes" -a ! -d "$srcdir/.git"; then
+  AC_ERROR([Cannot --enable-git-commit when source tree is not a git checkout])
+fi
+AM_CONDITIONAL(AUTO_GIT_COMMIT, [test "x$enable_git_commit" = "xyes"])
+
 AC_ARG_WITH([gssapi],
   [AS_HELP_STRING([--without-gssapi],
                   [disable GSSAPI support])],