initial underpinnings for mingw/cross compilation support

 Use canonical host rather than target so that this works:
 CC=i686-w64-mingw32-gcc ./configure --host=i686-w64-mingw32

 Conditionally compile Linux issetugid compatibility function

ok beck@

2 files changed, 22 insertions, 13 deletions

diff --git a/configure.ac.tpl b/configure.ac.tpl
index 8accb4d..cbd62a0 100644
--- a/configure.ac.tpl
+++ b/configure.ac.tpl
@@ -1,5 +1,5 @@
 AC_INIT([libressl], [VERSION])
-AC_CANONICAL_TARGET
+AC_CANONICAL_HOST
 AM_INIT_AUTOMAKE([subdir-objects])
 AC_CONFIG_MACRO_DIR([m4])
 
@@ -8,29 +8,33 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AC_SUBST([USER_CFLAGS], "-O2 $CFLAGS")
 CFLAGS="$CFLAGS -Wall -std=c99 -g"
 
-case $target_os in
+case $host_os in
         *darwin*)
-                TARGET_OS=darwin;
+                HOST_OS=darwin;
                 LDFLAGS="$LDFLAGS -Qunused-arguments"
                 ;;
         *linux*)
-                TARGET_OS=linux;
+                HOST_OS=linux;
                 CFLAGS="$CFLAGS -D_BSD_SOURCE -D_POSIX_SOURCE -D_GNU_SOURCE"
                 ;;
         *solaris*)
-                TARGET_OS=solaris;
+                HOST_OS=solaris;
                 CFLAGS="$CFLAGS -D__EXTENSIONS__ -D_XOPEN_SOURCE=600 -DBSD_COMP"
                 AC_SUBST([PLATFORM_LDADD], ['-lnsl -lsocket'])
                 ;;
         *openbsd*)
                 AC_DEFINE([HAVE_ATTRIBUTE__BOUNDED__], [1], [OpenBSD gcc has bounded])
                 ;;
+        *mingw*)
+                HOST_OS=win32
+                ;;
         *) ;;
 esac
 
-AM_CONDITIONAL(TARGET_DARWIN, test x$TARGET_OS = xdarwin)
-AM_CONDITIONAL(TARGET_LINUX, test x$TARGET_OS = xlinux)
-AM_CONDITIONAL(TARGET_SOLARIS, test x$TARGET_OS = xsolaris)
+AM_CONDITIONAL(HOST_DARWIN, test x$HOST_OS = xdarwin)
+AM_CONDITIONAL(HOST_LINUX, test x$HOST_OS = xlinux)
+AM_CONDITIONAL(HOST_SOLARIS, test x$HOST_OS = xsolaris)
+AM_CONDITIONAL(HOST_WIN, test x$HOST_OS = xwin)
 
 AC_CHECK_FUNC([clock_gettime],,
         [AC_SEARCH_LIBS([clock_gettime],[rt posix4])])
@@ -72,8 +76,8 @@ AM_CONDITIONAL(NO_ARC4RANDOM_BUF, test "x$NO_ARC4RANDOM_BUF" = "xyes")
 
 # overrides for arc4random_buf implementations with known issues
 AM_CONDITIONAL(NO_ARC4RANDOM_BUF,
-   test x$TARGET_OS = xdarwin \
-     -o x$TARGET_OS = xsolaris \
+   test x$HOST_OS = xdarwin \
+     -o x$HOST_OS = xsolaris \
          -o x$NO_ARC4RANDOM_BUF = xyes)
 
 AC_CHECK_FUNC(getentropy,[AC_SEARCH_LIBS(write,, [NO_GETENTROPY=],
diff --git a/crypto/Makefile.am.tpl b/crypto/Makefile.am.tpl
index 20c3495..d79a270 100644
--- a/crypto/Makefile.am.tpl
+++ b/crypto/Makefile.am.tpl
@@ -45,22 +45,27 @@ if NO_ARC4RANDOM_BUF
 libcompat_la_SOURCES += compat/arc4random.c
 
 if NO_GETENTROPY
-if TARGET_LINUX
+if HOST_LINUX
 libcompat_la_SOURCES += compat/getentropy_linux.c
 endif
-if TARGET_DARWIN
+if HOST_DARWIN
 libcompat_la_SOURCES += compat/getentropy_osx.c
 endif
-if TARGET_SOLARIS
+if HOST_SOLARIS
 libcompat_la_SOURCES += compat/getentropy_solaris.c
 endif
+if HOST_WIN
+libcompat_la_SOURCES += compat/getentropy_win.c
+endif
 endif
 
 endif
 
 if NO_ISSETUGID
+if HOST_LINUX
 libcompat_la_SOURCES += compat/issetugid_linux.c
 endif
+endif
 
 noinst_HEADERS = des/ncbc_enc.c
 noinst_HEADERS += compat/thread_private.h