diff options
Diffstat (limited to 'libbuild2/cc/guess.cxx')
| -rw-r--r-- | libbuild2/cc/guess.cxx | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/libbuild2/cc/guess.cxx b/libbuild2/cc/guess.cxx index 99599f9..8fe4769 100644 --- a/libbuild2/cc/guess.cxx +++ b/libbuild2/cc/guess.cxx @@ -66,7 +66,7 @@ #endif #include <map> -#include <cstring> // strlen(), strchr() +#include <cstring> // strlen(), strchr(), strstr() #include <libbuild2/diagnostics.hxx> @@ -766,7 +766,7 @@ namespace build2 // static guess_result guess (const char* xm, - lang, + lang xl, const path& xc, const strings& x_mo, const optional<compiler_id>& xi, @@ -1206,8 +1206,7 @@ namespace build2 if (!r.empty ()) { - if (pt != invalid && - (pt != r.id.type || (pv && *pv != r.id.variant))) + if (pt != invalid && (pt != r.id.type || (pv && *pv != r.id.variant))) { l4 ([&]{trace << "compiler type guess mismatch" << ", pre-guessed " << pre @@ -1229,6 +1228,27 @@ namespace build2 else l4 ([&]{trace << "unable to determine compiler type of " << xc;}); + // Warn if the absolute compiler path looks like a ccache wrapper. + // + // The problem with ccache is that it pretends to be real GCC (i.e., + // it's --version output is indistinguishable from real GCC's) but does + // not handle all valid GCC modes, in particular -fdirectives-only. As a + // poor man's solution we check if the absolute compiler path contains + // any mentioning of ccache (for example, /usr/lib64/ccache/g++ on + // Fedora). + // + if (!r.empty ()) + { + if (r.id.type == compiler_type::gcc || + r.id.type == compiler_type::clang) + { + if (strstr (r.path.effect_string (), "ccache") != nullptr) + warn << r.path << " looks like a ccache wrapper" << + info << "ccache cannot be used as a " << xl << " compiler" << + info << "use config." << xm << " to override"; + } + } + return r; } |