Make tools capable of reporting a system-wide path used to locate input files

[builder.git] / source / gnucxxcompiler.cpp

diff --git a/source/gnucxxcompiler.cpp b/source/gnucxxcompiler.cpp
index fb7fbdce2cf37d0601f545e40c71d5c9528e0a5d..0601fc29c5f596fbf1a99d1956450ad13ca10abd 100644 (file)
--- a/source/gnucxxcompiler.cpp
+++ b/source/gnucxxcompiler.cpp
@@ -1,6 +1,12 @@
+#include <msp/fs/stat.h>
+#include <msp/io/print.h>
+#include <msp/strings/regex.h>
+#include "builder.h"
 #include "csourcefile.h"
+#include "externaltask.h"
 #include "gnucxxcompiler.h"
 
+using namespace std;
 using namespace Msp;
 
 GnuCxxCompiler::GnuCxxCompiler(Builder &b):
@@ -9,6 +15,37 @@ GnuCxxCompiler::GnuCxxCompiler(Builder &b):
        input_suffixes.push_back(".cpp");
        input_suffixes.push_back(".cc");
        aux_suffixes.push_back(".hpp");
+
+       ExternalTask::Arguments argv;
+       argv.push_back(name);
+       argv.push_back("--version");
+       ExternalTask task(argv);
+       task.set_stdout(ExternalTask::CAPTURE);
+       task.set_stderr(ExternalTask::IGNORE);
+       task.start();
+       Task::Status status;
+       while((status=task.check())==Task::RUNNING) ;
+       if(status==Task::SUCCESS)
+               if(RegMatch m = Regex("[0-9]\\.[0-9.]+").match(task.get_output()))
+               {
+                       string cxx_ver = m[0].str;
+                       while(!cxx_ver.empty())
+                       {
+                               FS::Path cxx_path = FS::Path("/usr/include/c++")/cxx_ver;
+                               if(FS::is_dir(cxx_path))
+                               {
+                                       if(builder.get_verbose()>=5)
+                                               IO::print("%s version is %s\n", name, cxx_ver);
+                                       system_path.push_back(cxx_path);
+                                       break;
+                               }
+
+                               string::size_type dot = cxx_ver.rfind('.');
+                               if(dot==string::npos)
+                                       break;
+                               cxx_ver.erase(dot);
+                       }
+               }
 }
 
 Target *GnuCxxCompiler::create_source(const Component &comp, const FS::Path &path) const