diff options
Diffstat (limited to 'libbuild2/cc/module.cxx')
| -rw-r--r-- | libbuild2/cc/module.cxx | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/libbuild2/cc/module.cxx b/libbuild2/cc/module.cxx index 70624a2..cf6c6e4 100644 --- a/libbuild2/cc/module.cxx +++ b/libbuild2/cc/module.cxx @@ -57,7 +57,7 @@ namespace build2 // config.x // - strings mode; + strings omode; // Original mode. { // Normally we will have a persistent configuration and computing the // default value every time will be a waste. So try without a default @@ -141,19 +141,31 @@ namespace build2 fail << "invalid path '" << s << "' in " << config_x; } - mode.assign (++v.begin (), v.end ()); + omode.assign (++v.begin (), v.end ()); // Save original path/mode in *.config.path/mode. // rs.assign (x_c_path) = xc; - rs.assign (x_c_mode) = mode; + rs.assign (x_c_mode) = omode; + + // Merge the configured mode options into user-specified (which must + // be done before loading the *.guess module). + // + // In particular, this ability to specify the compiler mode in a + // buildfile is useful in embedded development where the project may + // need to hardcode things like -target, -nostdinc, etc. + // + const strings& mode (cast<strings> (rs.assign (x_mode) += omode)); // Figure out which compiler we are dealing with, its target, etc. // // Note that we could allow guess() to modify mode to support // imaginary options (such as /MACHINE for cl.exe). Though it's not // clear what cc.mode would contain (original or modified). Note that - // we are now folding *.std options into mode options. + // we are now adding *.std options into mode options. + // + // @@ But can't the language standard options alter things like search + // directories? // x_info = &build2::cc::guess ( ctx, @@ -222,9 +234,10 @@ namespace build2 // Assign values to variables that describe the compiler. // + // Note: x_mode is dealt with above. + // rs.assign (x_path) = process_path_ex ( xi.path, x_name, xi.checksum, env_checksum); - const strings& xm (cast<strings> (rs.assign (x_mode) = move (mode))); rs.assign (x_id) = xi.id.string (); rs.assign (x_id_type) = to_string (xi.id.type); @@ -282,8 +295,8 @@ namespace build2 if (!xi.pattern.empty ()) h.assign ("config.cc.pattern") = xi.pattern; - if (!xm.empty ()) - h.assign ("config.cc.mode") = xm; + if (!omode.empty ()) + h.assign ("config.cc.mode") = move (omode); h.assign (c_runtime) = xi.runtime; h.assign (c_stdlib) = xi.c_stdlib; |