Windows/Clang: Build system adaptation

* Bump win32-tarballs to 0.7
* Move Windows toolchain autoconf logic into separate file
* Use clang and LLVM utilities as described in #21019
* Disable object merging as lld doesn't support -r
* Drop --oformat=pe-bigobj-x86-64 arguments from ld flags as LLD detects
  that the output is large on its own.
* Drop gcc wrapper since Clang finds its root fine on its own.

1 files changed, 0 insertions, 66 deletions

diff --git a/driver/gcc/gcc.c b/driver/gcc/gcc.c
deleted file mode 100644
index aa63bb0498..0000000000
--- a/driver/gcc/gcc.c
+++ /dev/null
@@ -1,66 +0,0 @@
-
-/* gcc on mingw is hardcoded to use /mingw (which is c:/mingw) to
-   find various files. If this is a different version of mingw to the
-   one that we have in the GHC tree then things can go wrong. We
-   therefore need to add various -B flags to the gcc commandline,
-   so that it uses our in-tree mingw. Hence this wrapper. */
-
-#include "cwrapper.h"
-#include "getLocation.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-
-int main(int argc, char** argv) {
-    char *binDir;
-    char *exePath;
-    char *preArgv[4];
-    char *oldPath;
-    char *newPath;
-    char *base;
-    char *version;
-    int n;
-
-    binDir = getExecutablePath();
-    exePath = mkString("%s/realgcc.exe", binDir);
-
-    /* We need programs like
-           inplace/mingw/libexec/gcc/mingw32/4.5.0/cc1.exe
-       to be able to find the DLLs in inplace/mingw/bin, so we need to
-       add it to $PATH */
-    oldPath = getenv("PATH");
-    if (!oldPath) {
-        die("Couldn't read PATH\n");
-    }
-    n = snprintf(NULL, 0, "PATH=%s;%s", binDir, oldPath);
-    n++;
-    newPath = malloc(n);
-    if (!newPath) {
-        die("Couldn't allocate space for PATH\n");
-    }
-    snprintf(newPath, n, "PATH=%s;%s", binDir, oldPath);
-    n = putenv(newPath);
-    if (n) {
-        die("putenv failed\n");
-    }
-
-    /* GCC Version. */
-    version = mkString("%d.%d.%d", __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__);
-
-    /* Without these -B args, gcc will still work. However, if you
-       have a mingw installation in c:/mingw then it will use files
-       from that in preference to the in-tree files. */
-    preArgv[0] = mkString("-B%s", binDir);
-    preArgv[1] = mkString("-B%s/../lib", binDir);
-#if defined(__MINGW64__)
-    base = mkString("x86_64-w64-mingw32");
-#else
-    base = mkString("i686-w64-mingw32");
-#endif
-
-    preArgv[2] = mkString("-B%s/../lib/gcc/%s/%s"    , binDir, base, version);
-    preArgv[3] = mkString("-B%s/../libexec/gcc/%s/%s", binDir, base, version);
-
-    run(exePath, 4, preArgv, argc - 1, argv + 1, NULL);
-}
-