Remove the Windows GCC driver.

Summary:
This patch drops the GCC driver and instead moves
the only remaining path that we need to keep for
backwards compatibility to the settings file.

It also generalizes the code that expands `$TopDir`
so it can expand it within any location in the string
and also changes it so `$TopDir` is expanded only
after the words call because `$TopDir` can contains
spaces which would be horribly broken.

Test Plan: ./validate

Reviewers: austin, hvr, bgamari

Reviewed By: bgamari

Subscribers: rwbarton, thomie, erikd

GHC Trac Issues: #13709

Differential Revision: https://phabricator.haskell.org/D3592

1 files changed, 0 insertions, 66 deletions

diff --git a/driver/gcc/gcc.c b/driver/gcc/gcc.c
deleted file mode 100644
index b398c5ea46..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);
-}
-