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-rw-r--r--libbuild2/cc/common.cxx14
1 files changed, 13 insertions, 1 deletions
diff --git a/libbuild2/cc/common.cxx b/libbuild2/cc/common.cxx
index 2a8bc50..9a4a07c 100644
--- a/libbuild2/cc/common.cxx
+++ b/libbuild2/cc/common.cxx
@@ -1691,6 +1691,10 @@ namespace build2
// Note that clang-cl appears to use -fansi-escape-codes. See GH
// issue #312 for background.
//
+ // Note that MSVC ignores /diagnostics:color if diagnostics is
+ // written to a pipe. See GH issue #312 for details and a link to
+ // the MSVC bug report.
+ //
if (show_diag_color ())
{
if (cvariant.empty () &&
@@ -1716,7 +1720,8 @@ namespace build2
//
// Supported from GCC 4.9 (8.1 on Windows) and (at least) from Clang
// 3.5. Clang supports -f[no]color-diagnostics in addition to the
- // GCC's spelling.
+ // GCC's spelling. Note that to enable color on Windows Clang also
+ // needs -fansi-escape-codes.
//
if (
#ifndef _WIN32
@@ -1742,7 +1747,14 @@ namespace build2
show_diag_color () ? "-fdiagnostics-color" :
stderr_term ? "-fno-diagnostics-color" :
nullptr))
+ {
args.push_back (o);
+
+#ifdef _WIN32
+ if (ctype == compiler_type::clang && o[2] != 'n')
+ args.push_back ("-fansi-escape-codes");
+#endif
+ }
}
}