MSVC 2012+: Permit linking to 32-bit, MinGW-built libraries.

Notably, this permits linking to the 32-bit Perl binaries advertised on
perl.org, namely Strawberry Perl and ActivePerl.  This has a side effect
of permitting linking to binaries built with obsolete MSVC versions.

By default, MSVC 2012 and later require a "safe exception handler table"
in each binary.  MinGW-built, 32-bit DLLs lack the relevant exception
handler metadata, so linking to them failed with error LNK2026.  Restore
the semantics of MSVC 2010, which omits the table from a given binary if
some linker input lacks metadata.  This has no effect on 64-bit builds
or on MSVC 2010 and earlier.  Back-patch to 9.3 (all supported
versions).

Reported by Victor Wagner.

Discussion: https://postgr.es/m/20160326154321.7754ab8f@wagner.wagner.home

diff --git a/src/tools/msvc/MSBuildProject.pm b/src/tools/msvc/MSBuildProject.pm
index dc47ff1b6dd412f04e51cf319d3296a0f02aa032..143fa81bdf8969c02df670eb0cb8690f01424656 100644 (file)
--- a/src/tools/msvc/MSBuildProject.pm
+++ b/src/tools/msvc/MSBuildProject.pm
@@ -320,6 +320,8 @@ sub WriteItemDefinitionGroup
       false
       .\\$cfgname\\$self->{name}\\$self->{name}.map
       false
+      
+      
       Console
       $targetmachine
 EOF