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authorBoris Kolpackov <boris@codesynthesis.com>2021-09-20 10:51:12 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2021-09-20 10:51:12 +0200
commitab978916ef5d3a8f876953697c6eb9cdeedbc998 (patch)
treec774d9c3d91db7e5dd5024f8e950c061342c9f61 /libbuild2/cc
parent9b410048e83053f58491dac732e7a228c488c408 (diff)
Improve MSVC /showIncludes output handling
Diffstat (limited to 'libbuild2/cc')
-rw-r--r--libbuild2/cc/compile-rule.cxx48
1 files changed, 35 insertions, 13 deletions
diff --git a/libbuild2/cc/compile-rule.cxx b/libbuild2/cc/compile-rule.cxx
index df7be87..278f0cc 100644
--- a/libbuild2/cc/compile-rule.cxx
+++ b/libbuild2/cc/compile-rule.cxx
@@ -4403,11 +4403,16 @@ namespace build2
ifdstream::badbit);
size_t skip (skip_count);
- string l; // Reuse.
+ string l, l2; // Reuse.
for (bool first (true), second (false); !restart; )
{
if (eof (getline (is, l)))
+ {
+ if (bad_error && !l2.empty ())
+ text << l2;
+
break;
+ }
l6 ([&]{trace << "header dependency line '" << l << "'";});
@@ -4418,20 +4423,31 @@ namespace build2
case compiler_class::msvc:
{
// The first line should be the file we are compiling,
- // unless this is clang-cl. If it is not, then something
- // went wrong even before we could compile anything
- // (e.g., file does not exist). In this case the first
- // line (and everything after it) is presumably
- // diagnostics.
+ // unless this is clang-cl.
+ //
+ // If it is not, then we have several possibilities:
//
- // It can, however, be a command line warning, for
- // example:
+ // First, it can be a command line warning, for example:
//
// cl : Command line warning D9025 : overriding '/W3' with '/W4'
//
// So we try to detect and skip them assuming they will
// also show up during the compilation proper.
//
+ // Another possibility is a mis-spelled option that is
+ // treated as another file to compile, for example:
+ //
+ // cl junk /nologo /P /showIncluses /TP foo.cxx
+ // junk
+ // foo.cxx
+ // c1xx: fatal error C1083: Cannot open source file: 'junk': No such file or directory
+ //
+ // Yet another possibility is that something went wrong
+ // even before we could compile anything.
+ //
+ // So the plan is to keep going (in the hope of C1083)
+ // but print the last line if there is no more input.
+ //
if (first)
{
if (cvariant != "clang")
@@ -4442,12 +4458,18 @@ namespace build2
//
size_t p (msvc_sense_diag (l, 'D').first);
if (p != string::npos && l[p] == '9')
- continue;
-
- text << l;
- bad_error = true;
- break;
+ ; // Skip.
+ else
+ {
+ l2 = l;
+ bad_error = true;
+ }
+
+ continue;
}
+
+ l2.clear ();
+
// Fall through.
}