Improve compiler/platform/libs information in logs

Add and use usedCompilerAndPlatform().  This adds compiler information to
INFO logs and the --version output, and may be helpful when trying to
diagnose/reproduce user-reported problems.

Also make INFO logs include usedLibs() output.

Closes #235

1 files changed, 6 insertions, 0 deletions

diff --git a/src/FeatureConfig.h b/src/FeatureConfig.h
index 6f33871a..9c0a2798 100644
--- a/src/FeatureConfig.h
+++ b/src/FeatureConfig.h
@@ -67,6 +67,12 @@ const char* strSupportedFeature(int feature);
 // aria2.
 std::string usedLibs();
 
+// Returns a summary string of the used compiler/platform.
+std::string usedCompilerAndPlatform();
+
+// Returns the system information about the OS this binary is running on.
+std::string getOperatingSystemInfo();
+
 } // namespace aria2
 
 #endif // D_FEATURE_CONFIG_H