From 1c0dbcc95b2e8e9a20279f0dab0eecd115be5484 Mon Sep 17 00:00:00 2001
From: Uwe Hermann <uwe@hermann-uwe.de>
Date: Sun, 4 May 2014 22:17:03 +0200
Subject: [PATCH] Fix 'make install' on OSes where 'python3' doesn't exist.

Sometimes the Python 3 executable is called just 'python3', sometimes
it is called 'python3.4' and so on. Handle all cases transparently for
the user.

Before:

  $ make install
  /usr/bin/env: python3: No such file or directory

After:

  $ make install
  python3.4 ./tools/install-decoders -i ./decoders -o [...]
  Installing 36 protocol decoders:
  [...]
---
 Makefile.am  | 4 ++--
 configure.ac | 7 +++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index c4a9d47..741720f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -89,8 +89,8 @@ dist-hook: ChangeLog
 
 install-decoders:
 	$(MKDIR_P) $(DESTDIR)$(DECODERS_DIR)
-	${top_srcdir}/tools/install-decoders -i ${top_srcdir}/decoders \
-		-o $(DESTDIR)$(DECODERS_DIR)
+	$(PYTHON3) ${top_srcdir}/tools/install-decoders \
+		-i ${top_srcdir}/decoders -o $(DESTDIR)$(DECODERS_DIR)
 
 install-data-hook: install-decoders
 
diff --git a/configure.ac b/configure.ac
index 420c8f3..c27376f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -115,6 +115,13 @@ PKG_CHECK_MODULES([python3], [python3 >= 3.2],
 AC_SUBST(CPPFLAGS_PYTHON)
 AC_SUBST(LDFLAGS_PYTHON)
 
+# We also need to find the name of the python3 executable (for 'make install').
+# Some OSes call this python3, some call it python3.2, etc. etc.
+AC_CHECK_PROGS([PYTHON3], [python3.4 python3.3 python3.2 python3])
+if test "x$PYTHON3" == "x"; then
+	AC_MSG_ERROR([cannot find python3 executable.])
+fi
+
 # Link against libm, this is required (among other things) by Python.
 AC_SEARCH_LIBS([pow], [m])
 
-- 
2.30.2