opts: add logic to generate options-urls.cc

Changed in v2:
- split out from the code that uses this
- now handles lang-specific URLs, as well as generic URLs
- the generated options-urls.cc now contains a function with a
  switch statement, rather than an array, to support
  lang-specific URLs:

const char *
get_opt_url_suffix (int option_index, unsigned lang_mask)
{
  switch (option_index)
    {
     [...snip...]
     case OPT_B:
       if (lang_mask & CL_D)
         return "gdc/Directory-Options.html#index-B";
       return "gcc/Directory-Options.html#index-B";
    [...snip...]
  return nullptr;
}

gcc/ChangeLog:
	* Makefile.in (ALL_OPT_URL_FILES): New.
	(GCC_OBJS): Add options-urls.o.
	(OBJS): Likewise.
	(OBJS-libcommon): Likewise.
	(s-options): Depend on $(ALL_OPT_URL_FILES), and add this to
	inputs to opt-gather.awk.
	(options-urls.cc): New Makefile target.
	* opt-functions.awk (url_suffix): New function.
	(lang_url_suffix): New function.
	* options-urls-cc-gen.awk: New file.
	* opts.h (get_opt_url_suffix): New decl.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

1 files changed, 14 insertions, 4 deletions

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 935ee4b..deb12e1 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1273,6 +1273,8 @@ FLAGS_TO_PASS = \
 # All option source files
 ALL_OPT_FILES=$(lang_opt_files) $(extra_opt_files)
 
+ALL_OPT_URL_FILES=$(patsubst %, %.urls, $(ALL_OPT_FILES))
+
 # Target specific, C specific object file
 C_TARGET_OBJS=@c_target_objs@
 
@@ -1289,7 +1291,7 @@ FORTRAN_TARGET_OBJS=@fortran_target_objs@
 RUST_TARGET_OBJS=@rust_target_objs@
 
 # Object files for gcc many-languages driver.
-GCC_OBJS = gcc.o gcc-main.o ggc-none.o gcc-urlifier.o
+GCC_OBJS = gcc.o gcc-main.o ggc-none.o gcc-urlifier.o options-urls.o
 
 c-family-warn = $(STRICT_WARN)
 
@@ -1612,6 +1614,7 @@ OBJS = \
 	optinfo.o \
 	optinfo-emit-json.o \
 	options-save.o \
+	options-urls.o \
 	opts-global.o \
 	ordered-hash-map-tests.o \
 	passes.o \
@@ -1838,7 +1841,8 @@ OBJS-libcommon = diagnostic-spec.o diagnostic.o diagnostic-color.o \
 # compiler and containing target-dependent code.
 OBJS-libcommon-target = $(common_out_object_file) prefix.o \
 	opts.o opts-common.o options.o vec.o hooks.o common/common-targhooks.o \
-	hash-table.o file-find.o spellcheck.o selftest.o opt-suggestions.o
+	hash-table.o file-find.o spellcheck.o selftest.o opt-suggestions.o \
+	options-urls.o
 
 # This lists all host objects for the front ends.
 ALL_HOST_FRONTEND_OBJS = $(foreach v,$(CONFIG_LANGUAGES),$($(v)_OBJS))
@@ -2441,9 +2445,9 @@ s-specs : Makefile
 	$(STAMP) s-specs
 
 optionlist: s-options ; @true
-s-options: $(ALL_OPT_FILES) Makefile $(srcdir)/opt-gather.awk
+s-options: $(ALL_OPT_FILES) $(ALL_OPT_URL_FILES) Makefile $(srcdir)/opt-gather.awk
 	LC_ALL=C ; export LC_ALL ; \
-	$(AWK) -f $(srcdir)/opt-gather.awk $(ALL_OPT_FILES) > tmp-optionlist
+	$(AWK) -f $(srcdir)/opt-gather.awk $(ALL_OPT_FILES) $(ALL_OPT_URL_FILES) > tmp-optionlist
 	$(SHELL) $(srcdir)/../move-if-change tmp-optionlist optionlist
 	$(STAMP) s-options
 
@@ -2459,6 +2463,12 @@ options-save.cc: optionlist $(srcdir)/opt-functions.awk $(srcdir)/opt-read.awk \
 	       -f $(srcdir)/optc-save-gen.awk \
 	       -v header_name="config.h system.h coretypes.h tm.h" < $< > $@
 
+options-urls.cc: optionlist $(srcdir)/opt-functions.awk $(srcdir)/opt-read.awk \
+    $(srcdir)/options-urls-cc-gen.awk
+	$(AWK) -f $(srcdir)/opt-functions.awk -f $(srcdir)/opt-read.awk \
+	       -f $(srcdir)/options-urls-cc-gen.awk \
+	       -v header_name="config.h system.h coretypes.h tm.h" < $< > $@
+
 options.h: s-options-h ; @true
 s-options-h: optionlist $(srcdir)/opt-functions.awk $(srcdir)/opt-read.awk \
     $(srcdir)/opth-gen.awk