Fixed bad dependency generation

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6490 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 15 insertions, 3 deletions

diff --git a/tools/make.inc b/tools/make.inc
index ea9815b6d2..b5eae4430e 100644
--- a/tools/make.inc
+++ b/tools/make.inc
@@ -14,12 +14,24 @@ $(OBJDIR)/%.o: %.S
         @echo "CC $<"
         $(SILENT)$(CC) $(CFLAGS) -c $< -o $@
 
-# the lame echo stuff down here is to prevent any compiler errors/warnings
-# to cause an error code to get returned and thus stop the build
+# The echo stuff last in the dep update shell magic is to prevent any compiler
+# errors/warnings to cause an error code to get returned and thus stop the
+# build
+#
+# This script checks for the presence of $(BUILDDIR)/lang.h and if it doesn't
+# alreay exist, it is created. This is because lots of files include this
+# *generated* file and if it doesn't exist when we generate the deps it is no
+# good. There's a -MG compiler option to cover for this case, but it doesn't
+# play nicely into this as it then adds a dependency to the lang.h file
+# without the proper path.
+#
 $(DEPFILE): $(SOURCES)
         $(SILENT)mkdir -p `dirname $(DEPFILE)`
         $(SILENT)rm -f $(DEPFILE)
-        $(SILENT)(for each in $(SOURCES) x; do \
+        $(SILENT)(if test ! -f $(BUILDDIR)/lang.h; then \
+          touch $(BUILDDIR)/lang.h; \
+        fi; \
+        for each in $(SOURCES) x; do \
           if test "x" != "$$each"; then \
             obj=`echo $$each | sed -e 's/\.[cS]/.o/'`; \
             $(CC) -MM -MT "$(OBJDIR)/$$obj" $(CFLAGS) $$each >> $(DEPFILE) 2>/dev/null; \