Automatically run 'git submodule update' if necessary

This makes sure pdclib exists by updating for the all and
all-recursive targets

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/Makefile.am b/Makefile.am
index c1ba75356adcbf45fe738a6a797058a1a1d7e082..4145946ee5e2d03f84229cfadae1cc8baeadce8b 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -6,6 +6,12 @@ MAINTAINERCLEANFILES = ChangeLog
 
 .PHONY: ChangeLog
 
+all: pdclib/Makefile
+all-recursive: pdclib/Makefile
+
+pdclib/Makefile:
+       git submodule update
+
 ChangeLog:
        (GIT_DIR=$(top_srcdir)/.git git log > .changelog.tmp && mv .changelog.tmp ChangeLog; rm -f .changelog.tmp) || \
        (touch ChangeLog; echo 'git directory not found: installing possibly empty changelog.' >&2)