[PATCH] gitk: Fallback to po2msg if msgfmt is not available

If msgfmt is not in our PATH, or it is but it does not seem to honor the
--tcl command line option then we need to fallback to po2msg.  This is
rather common on Mac OS X systems, but also can show up on a Linux OS
if GNU gettext is not installed on the system.

This particular block of code was copied from git-gui's Makefile,
where we have already (reasonably) vetted this fallback system.

Signed-off-by: Shawn O. Pearce <redacted>
---
 Makefile |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/Makefile b/Makefile
index ae2b80b..49a9209 100644
--- a/Makefile
+++ b/Makefile

@@ -22,6 +22,14 @@ ifdef NO_MSGFMT
 	MSGFMT ?= $(TCL_PATH) po/po2msg.sh
 else
 	MSGFMT ?= msgfmt
+	ifeq ($(shell $(MSGFMT) >/dev/null 2>&1 || echo $$?),127)
+		MSGFMT := $(TCL_PATH) po/po2msg.sh
+	endif
+	ifeq (msgfmt,$(MSGFMT))
+	ifeq ($(shell $(MSGFMT) --tcl -l C -d . /dev/null 2>/dev/null || echo $?),1)
+		MSGFMT := $(TCL_PATH) po/po2msg.sh
+	endif
+	endif
 endif
 
 PO_TEMPLATE = po/gitk.pot

-- 
1.5.4.3.529.gb25fb