diff options
Diffstat (limited to 'Source/cmLocalGenerator.cxx')
| -rw-r--r-- | Source/cmLocalGenerator.cxx | 92 |
1 files changed, 89 insertions, 3 deletions
diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx index e20bfe1..71d3c51 100644 --- a/Source/cmLocalGenerator.cxx +++ b/Source/cmLocalGenerator.cxx @@ -28,6 +28,11 @@ #include "cmTest.h" #include "cmake.h" +#if defined(CMAKE_BUILD_WITH_CMAKE) +# define CM_LG_ENCODE_OBJECT_NAMES +# include <cmsys/MD5.h> +#endif + #include <cmsys/System.h> #include <ctype.h> // for isalpha @@ -2376,8 +2381,81 @@ cmLocalGenerator } } +#if defined(CM_LG_ENCODE_OBJECT_NAMES) +static std::string cmLocalGeneratorMD5(const char* input) +{ + char md5out[32]; + cmsysMD5* md5 = cmsysMD5_New(); + cmsysMD5_Initialize(md5); + cmsysMD5_Append(md5, reinterpret_cast<unsigned char const*>(input), -1); + cmsysMD5_FinalizeHex(md5, md5out); + cmsysMD5_Delete(md5); + return std::string(md5out, 32); +} + +static bool +cmLocalGeneratorShortenObjectName(std::string& objName, + std::string::size_type max_len) +{ + // Replace the beginning of the path portion of the object name with + // its own md5 sum. + std::string::size_type pos = objName.find('/', objName.size()-max_len+32); + if(pos != objName.npos) + { + std::string md5name = cmLocalGeneratorMD5(objName.substr(0, pos).c_str()); + md5name += objName.substr(pos); + objName = md5name; + + // The object name is now short enough. + return true; + } + else + { + // The object name could not be shortened enough. + return false; + } +} + +static bool cmLocalGeneratorCheckObjectName(std::string& objName, + std::string::size_type dir_len) +{ + // Choose a maximum file name length. +#if defined(_WIN32) || defined(__CYGWIN__) + std::string::size_type const max_total_len = 250; +#else + std::string::size_type const max_total_len = 1000; +#endif + + // Enforce the maximum file name length if possible. + std::string::size_type max_obj_len = max_total_len; + if(dir_len < max_total_len) + { + max_obj_len = max_total_len - dir_len; + if(objName.size() > max_obj_len) + { + // The current object file name is too long. Try to shorten it. + return cmLocalGeneratorShortenObjectName(objName, max_obj_len); + } + else + { + // The object file name is short enough. + return true; + } + } + else + { + // The build directory in which the object will be stored is + // already too deep. + return false; + } +} +#endif + //---------------------------------------------------------------------------- -std::string& cmLocalGenerator::CreateSafeUniqueObjectFileName(const char* sin) +std::string& +cmLocalGenerator +::CreateSafeUniqueObjectFileName(const char* sin, + std::string::size_type dir_len) { // Look for an existing mapped name for this object file. std::map<cmStdString,cmStdString>::iterator it = @@ -2435,6 +2513,12 @@ std::string& cmLocalGenerator::CreateSafeUniqueObjectFileName(const char* sin) while ( !done ); } +#if defined(CM_LG_ENCODE_OBJECT_NAMES) + cmLocalGeneratorCheckObjectName(ssin, dir_len); +#else + (void)dir_len; +#endif + // Insert the newly mapped object file name. std::map<cmStdString, cmStdString>::value_type e(sin, ssin); it = this->UniqueObjectNamesMap.insert(e).first; @@ -2446,7 +2530,9 @@ std::string& cmLocalGenerator::CreateSafeUniqueObjectFileName(const char* sin) //---------------------------------------------------------------------------- std::string -cmLocalGenerator::GetObjectFileNameWithoutTarget(const cmSourceFile& source) +cmLocalGenerator +::GetObjectFileNameWithoutTarget(const cmSourceFile& source, + std::string::size_type dir_len) { // Construct the object file name using the full path to the source // file which is its only unique identification. @@ -2517,7 +2603,7 @@ cmLocalGenerator::GetObjectFileNameWithoutTarget(const cmSourceFile& source) } // Convert to a safe name. - return this->CreateSafeUniqueObjectFileName(objectName.c_str()); + return this->CreateSafeUniqueObjectFileName(objectName.c_str(), dir_len); } //---------------------------------------------------------------------------- |