Fortran: Add support for submodule dependencies

Since commit v3.7.0-rc1~73^2~1 (Fortran: Add support for submodule
syntax in dependency scanning, 2016-09-05) we support parsing Fortran
sources that use submodule syntax, but it left addition of `.smod`
dependencies to future work.  Add it now.

The syntax

    submodule (module_name) submodule_name

means the current source requires `module_name.mod` and provides
`module_name@submodule_name.smod`.  The syntax

    submodule (module_name:submodule_name) nested_submodule_name

means the current source requires `module_name@submodule_name.smod`
provides `module_name@nested_submodule_name.smod`.

Fixes: #17017

1 files changed, 5 insertions, 2 deletions

diff --git a/Source/cmDependsFortran.cxx b/Source/cmDependsFortran.cxx
index da644dd..dbea15a 100644
--- a/Source/cmDependsFortran.cxx
+++ b/Source/cmDependsFortran.cxx
@@ -31,6 +31,8 @@ static void cmFortranModuleAppendUpperLower(std::string const& mod,
   std::string::size_type ext_len = 0;
   if (cmHasLiteralSuffix(mod, ".mod")) {
     ext_len = 4;
+  } else if (cmHasLiteralSuffix(mod, ".smod")) {
+    ext_len = 5;
   }
   std::string const& name = mod.substr(0, mod.size() - ext_len);
   std::string const& ext = mod.substr(mod.size() - ext_len);
@@ -283,7 +285,8 @@ void cmDependsFortran::MatchRemoteModules(std::istream& fin,
     if (line[0] == ' ') {
       if (doing_provides) {
         std::string mod = line;
-        if (!cmHasLiteralSuffix(mod, ".mod")) {
+        if (!cmHasLiteralSuffix(mod, ".mod") &&
+            !cmHasLiteralSuffix(mod, ".smod")) {
           // Support fortran.internal files left by older versions of CMake.
           // They do not include the ".mod" extension.
           mod += ".mod";
@@ -486,7 +489,7 @@ bool cmDependsFortran::CopyModule(const std::vector<std::string>& args)
   if (args.size() >= 5) {
     compilerId = args[4];
   }
-  if (!cmHasLiteralSuffix(mod, ".mod")) {
+  if (!cmHasLiteralSuffix(mod, ".mod") && !cmHasLiteralSuffix(mod, ".smod")) {
     // Support depend.make files left by older versions of CMake.
     // They do not include the ".mod" extension.
     mod += ".mod";