82 lines
2.3 KiB
Diff
82 lines
2.3 KiB
Diff
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diff --git a/ccache.c b/ccache.c
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index 64c979b..843929f 100644
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--- a/ccache.c
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+++ b/ccache.c
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@@ -647,6 +647,13 @@ static void process_args(int argc, char **argv)
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int found_S_opt = 0;
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struct stat st;
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char *e;
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+ /* is gcc being asked to output dependencies? */
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+ int generating_dependencies = 0;
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+ /* is the dependency makefile name overridden with -MF? */
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+ int dependency_filename_specified = 0;
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+ /* is the dependency makefile target name specified with -MQ or -MF? */
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+ int dependency_target_specified = 0;
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+
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stripped_args = args_init(0, NULL);
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@@ -725,6 +732,18 @@ static void process_args(int argc, char **argv)
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continue;
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}
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+ /* These options require special handling, because they
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+ behave differently with gcc -E, when the output
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+ file is not specified. */
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+
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+ if (strcmp(argv[i], "-MD") == 0 || strcmp(argv[i], "-MMD") == 0) {
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+ generating_dependencies = 1;
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+ } else if (strcmp(argv[i], "-MF") == 0) {
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+ dependency_filename_specified = 1;
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+ } else if (strcmp(argv[i], "-MQ") == 0 || strcmp(argv[i], "-MT") == 0) {
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+ dependency_target_specified = 1;
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+ }
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+
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/* options that take an argument */
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{
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const char *opts[] = {"-I", "-include", "-imacros", "-iprefix",
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@@ -837,6 +856,41 @@ static void process_args(int argc, char **argv)
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p[2] = 0;
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}
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+ /* If dependencies are generated, configure the preprocessor */
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+
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+ if (generating_dependencies && output_file) {
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+ if (!dependency_filename_specified) {
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+ char *default_depfile_name = x_strdup(output_file);
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+ char *p = strrchr(default_depfile_name, '.');
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+
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+ if (p) {
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+ if (strlen(p) < 2) {
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+ stats_update(STATS_ARGS);
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+ failed();
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+ return;
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+ }
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+ *p = 0;
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+ }
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+ else {
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+ int len = p - default_depfile_name;
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+
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+ p = x_malloc(len + 3);
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+ strncpy(default_depfile_name, p, len - 1);
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+ free(default_depfile_name);
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+ default_depfile_name = p;
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+ }
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+
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+ strcat(default_depfile_name, ".d");
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+ args_add(stripped_args, "-MF");
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+ args_add(stripped_args, default_depfile_name);
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+ }
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+
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+ if (!dependency_target_specified) {
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+ args_add(stripped_args, "-MT");
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+ args_add(stripped_args, output_file);
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+ }
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+ }
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+
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/* cope with -o /dev/null */
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if (strcmp(output_file,"/dev/null") != 0 && stat(output_file, &st) == 0 && !S_ISREG(st.st_mode)) {
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cc_log("Not a regular file %s\n", output_file);
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