diff --git a/Makefile b/Makefile
index 8d6d4515d2d635ff8b5e59e0ce38ffa566f5bb64..15fb8c23a34e7cd0242d691bd9427eb443d516d7 100644 (file)
--- a/Makefile
+++ b/Makefile
# DEFAULT_EDITOR='$GIT_FALLBACK_EDITOR',
# DEFAULT_EDITOR='"C:\Program Files\Vim\gvim.exe" --nofork'
#
-# Define COMPUTE_HEADER_DEPENDENCIES if your compiler supports the -MMD option
-# and you want to avoid rebuilding objects when an unrelated header file
-# changes.
-#
# Define CHECK_HEADER_DEPENDENCIES to check for problems in the hard-coded
# dependency rules.
#
ifdef CHECK_HEADER_DEPENDENCIES
COMPUTE_HEADER_DEPENDENCIES =
USE_COMPUTED_HEADER_DEPENDENCIES =
+else
+ifndef COMPUTE_HEADER_DEPENDENCIES
+dep_check = $(shell sh -c \
+ '$(CC) -c -MF /dev/null -MMD -MP -x c /dev/null -o /dev/null 2>&1; \
+ echo $$?')
+ifeq ($(dep_check),0)
+COMPUTE_HEADER_DEPENDENCIES=YesPlease
+endif
+endif
endif
ifdef COMPUTE_HEADER_DEPENDENCIES