msvc: fix "REG_STARTEND" issue

In 897d68e7af82 (Makefile: use curl-config --cflags, 2020-03-26), we
taught the build process to use `curl-config --cflags` to make sure that
it can find cURL's headers.

In the MSVC build, this is completely bogus because we're running in a
Git for Windows SDK whose `curl-config` supports the _GCC_ build.

Let's just ignore each and every `-I<path>` option where `<path>` points
to GCC/Clang specific headers.

Reported by Jeff Hostetler in
https://github.com/microsoft/git/issues/275.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/compat/vcbuild/scripts/clink.pl b/compat/vcbuild/scripts/clink.pl
index d9f71b7cbb71676567930f327c1c0acf0b67641a..61ad084a7b710e3b667fe191bd06a63879e5177e 100755 (executable)
--- a/compat/vcbuild/scripts/clink.pl
+++ b/compat/vcbuild/scripts/clink.pl
@@ -23,7 +23,9 @@ while (@ARGV) {
            # before any "-l*" flags.
            $is_debug = 1;
        }
-       if ("$arg" =~ /^-[DIMGOZ]/) {
+       if ("$arg" =~ /^-I\/mingw(32|64)/) {
+               # eat
+       } elsif ("$arg" =~ /^-[DIMGOZ]/) {
                push(@cflags, $arg);
        } elsif ("$arg" eq "-o") {
                my $file_out = shift @ARGV;