edje: add option to dump gnu style include dependencies in edje_cc.

Summary:
We were facing one problem in tizen sdk's build system as it does not trigger build for edc file
if only sub-edc files are changed. During analysis, we found that there is no option in edje_cc
for dumping include dependencies which other compiler (clang/ gcc etc) does have. We can do other
hack to solve this problem but it will be great if edje_cc can emit gnu style include dependency
target.

This patch will add support to generate gnu format include dependency file while compiling edc file.
similar to what gcc generates with option '-MMD -MF=<dep_file> -MT<dep_file>'
https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/Preprocessor-Options.html

Test Plan: no failure in existing test

Reviewers: raster, cedric

Reviewed By: cedric

Projects: #efl

Differential Revision: https://phab.enlightenment.org/D2263

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>

1 files changed, 13 insertions, 4 deletions

diff --git a/src/bin/edje/epp/cpplib.c b/src/bin/edje/epp/cpplib.c
index af6dbfb582..22a4c7aacf 100644
--- a/src/bin/edje/epp/cpplib.c
+++ b/src/bin/edje/epp/cpplib.c
@@ -6502,10 +6502,10 @@ cpp_handle_options(cpp_reader * pfile, int argc, char **argv)
                   /* The style of the choices here is a bit mixed.
                    * The chosen scheme is a hybrid of keeping all options in one string
                    * and specifying each option in a separate argument:
-                   * -M|-MM|-MD file|-MMD file [-MG].  An alternative is:
-                   * -M|-MM|-MD file|-MMD file|-MG|-MMG; or more concisely:
-                   * -M[M][G][D file].  This is awkward to handle in specs, and is not
-                   * as extensible.  */
+                   * -M|-MM|-MT file|-MD file|-MMD file [-MG].  An alternative is:
+                   * -M|-MM|-MT file|-MD file|-MMD file|-MG|-MMG; or more concisely:
+                   * -M[M][G][D file][T file].  This is awkward to handle in specs, and is
+                   * not as extensible.  */
                   /* ??? -MG must be specified in addition to one of -M or -MM.
                    * This can be relaxed in the future without breaking anything.
                    * The converse isn't true.  */
@@ -6532,6 +6532,15 @@ cpp_handle_options(cpp_reader * pfile, int argc, char **argv)
                                     argv[i]);
                        opts->deps_file = argv[++i];
                     }
+                  /* For MT option, use file named by next arg as Target-name to write
+                   * with the dependency information.  */
+                  else if (!strcmp(argv[i], "-MT"))
+                    {
+                       if (i + 1 == argc)
+                          cpp_fatal("Filename missing after %s option",
+                                    argv[i]);
+                       opts->deps_target = argv[++i];
+                    }
                   else
                     {
                        /* For -M and -MM, write deps on standard output