(default_compilers): Pass -MG to cpp if present.

(option_map): New option --print-missing-file-dependencies/-MG.

From-SVN: r7392

diff --git a/gcc/gcc.c b/gcc/gcc.c
index 0a54200593d77b0f70648fad5bca2c19626b08d6..519118f927ce3cf2c4db2d0f1e5b3016e5d96523 100644 (file)
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -503,7 +503,7 @@ static struct compiler default_compilers[] =
   {"@c",
    "cpp -lang-c %{nostdinc*} %{C} %{v} %{A*} %{I*} %{P} %I\
        %{C:%{!E:%eGNU C does not support -C without using -E}}\
-       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d}\
+       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{MG}\
         -undef -D__GNUC__=%v1 -D__GNUC_MINOR__=%v2\
        %{ansi:-trigraphs -$ -D__STRICT_ANSI__}\
        %{!undef:%{!ansi:%p} %P} %{trigraphs} \
@@ -524,7 +524,7 @@ static struct compiler default_compilers[] =
   {"-",
    "%{E:cpp -lang-c %{nostdinc*} %{C} %{v} %{A*} %{I*} %{P} %I\
        %{C:%{!E:%eGNU C does not support -C without using -E}}\
-       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d}\
+       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{MG}\
         -undef -D__GNUC__=%v1 -D__GNUC_MINOR__=%v2\
        %{ansi:-trigraphs -$ -D__STRICT_ANSI__}\
        %{!undef:%{!ansi:%p} %P} %{trigraphs}\
@@ -537,7 +537,7 @@ static struct compiler default_compilers[] =
   {"@objective-c",
    "cpp -lang-objc %{nostdinc*} %{C} %{v} %{A*} %{I*} %{P} %I\
        %{C:%{!E:%eGNU C does not support -C without using -E}}\
-       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d}\
+       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{MG}\
         -undef -D__OBJC__ -D__GNUC__=%v1 -D__GNUC_MINOR__=%v2\
         %{ansi:-trigraphs -$ -D__STRICT_ANSI__}\
        %{!undef:%{!ansi:%p} %P} %{trigraphs}\
@@ -561,7 +561,7 @@ static struct compiler default_compilers[] =
    "%{!E:%eCompilation of header file requested} \
     cpp %{nostdinc*} %{C} %{v} %{A*} %{I*} %{P} %I\
        %{C:%{!E:%eGNU C does not support -C without using -E}}\
-        %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} \
+        %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{MG}\
         -undef -D__GNUC__=%v1 -D__GNUC_MINOR__=%v2\
         %{ansi:-trigraphs -$ -D__STRICT_ANSI__}\
        %{!undef:%{!ansi:%p} %P} %{trigraphs}\
@@ -576,7 +576,7 @@ static struct compiler default_compilers[] =
   {"@c++",
    "cpp -lang-c++ %{nostdinc*} %{C} %{v} %{A*} %{I*} %{P} %I\
        %{C:%{!E:%eGNU C++ does not support -C without using -E}}\
-       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} \
+       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{MG}\
        -undef -D__GNUC__=%v1 -D__GNUG__=%v1 -D__cplusplus -D__GNUC_MINOR__=%v2\
        %{ansi:-trigraphs -$ -D__STRICT_ANSI__} %{!undef:%{!ansi:%p} %P}\
         %c %{O*:%{!O0:-D__OPTIMIZE__}} %{traditional} %{ftraditional:-traditional}\
@@ -624,7 +624,7 @@ static struct compiler default_compilers[] =
   {"@assembler-with-cpp",
    "cpp -lang-asm %{nostdinc*} %{C} %{v} %{A*} %{I*} %{P} %I\
        %{C:%{!E:%eGNU C does not support -C without using -E}}\
-       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{trigraphs} \
+       %{M} %{MM} %{MD:-MD %b.d} %{MMD:-MMD %b.d} %{MG} %{trigraphs}\
         -undef -$ %{!undef:%p %P} -D__ASSEMBLER__ \
         %c %{O*:%{!O0:-D__OPTIMIZE__}} %{traditional} %{ftraditional:-traditional}\
         %{traditional-cpp:-traditional}\
@@ -765,6 +765,7 @@ struct option_map option_map[] =
    {"--user-dependencies", "-MM", 0},
    {"--write-dependencies", "-MD", 0},
    {"--write-user-dependencies", "-MMD", 0},
+   {"--print-missing-file-dependencies", "-MG", 0},
    {"--optimize", "-O", "oj"},
    {"--no-line-commands", "-P", 0},
    {"--assemble", "-S", 0},