Handle ming32 as a host

zlib refuses to run configure with mingw32 host and insists that
win32/Makefile.gcc is used instead.

This requires a change in this Makefile to support static-only builds.

Fixes #694.

Signed-off-by: Alexey Neyman <stilor@att.net>

2 files changed, 60 insertions, 14 deletions

diff --git a/patches/zlib/1.2.11/120-mingw-static-only.patch b/patches/zlib/1.2.11/120-mingw-static-only.patch
new file mode 100644
index 0000000..9eef00b
--- /dev/null
+++ b/patches/zlib/1.2.11/120-mingw-static-only.patch
@@ -0,0 +1,25 @@
+diff -urpN zlib-1.2.11.orig/win32/Makefile.gcc zlib-1.2.11/win32/Makefile.gcc
+--- zlib-1.2.11.orig/win32/Makefile.gcc	2017-05-23 18:52:07.937730080 -0700
++++ zlib-1.2.11/win32/Makefile.gcc	2017-05-23 19:02:24.068666463 -0700
+@@ -71,7 +71,11 @@ OBJS = adler32.o compress.o crc32.o defl
+        gzwrite.o infback.o inffast.o inflate.o inftrees.o trees.o uncompr.o zutil.o
+ OBJA =
+ 
+-all: $(STATICLIB) $(SHAREDLIB) $(IMPLIB) example.exe minigzip.exe example_d.exe minigzip_d.exe
++all: $(STATICLIB) example.exe minigzip.exe
++
++ifeq ($(SHARED_MODE),1)
++all: $(SHAREDLIB) $(IMPLIB) example_d.exe minigzip_d.exe
++endif
+ 
+ test: example.exe minigzip.exe
+ 	./example
+@@ -125,7 +129,7 @@ zlibrc.o: win32/zlib1.rc
+ .PHONY: install uninstall clean
+ 
+ install: zlib.h zconf.h $(STATICLIB) $(IMPLIB)
+-	@if test -z "$(DESTDIR)$(INCLUDE_PATH)" -o -z "$(DESTDIR)$(LIBRARY_PATH)" -o -z "$(DESTDIR)$(BINARY_PATH)"; then \
++	@if test -z "$(INCLUDE_PATH)" -o -z "$(LIBRARY_PATH)" -o -z "$(BINARY_PATH)"; then \
+ 		echo INCLUDE_PATH, LIBRARY_PATH, and BINARY_PATH must be specified; \
+ 		exit 1; \
+ 	fi
diff --git a/scripts/build/companion_libs/050-zlib.sh b/scripts/build/companion_libs/050-zlib.sh
index 10779af..a3ba638 100644
--- a/scripts/build/companion_libs/050-zlib.sh
+++ b/scripts/build/companion_libs/050-zlib.sh
@@ -76,30 +76,51 @@ do_zlib_backend() {
     local ldflags
     local arg
     local -a extra_config
+    local -a extra_make
 
     for arg in "$@"; do
         eval "${arg// /\\ }"
     done
 
-    CT_DoLog EXTRA "Configuring zlib"
-
-    CT_DoExecLog CFG                                  \
-    CFLAGS="${cflags}"                                \
-    LDFLAGS="${ldflags}"                              \
-    CHOST="${host}"                                   \
-    ${CONFIG_SHELL}                                   \
-    "${CT_SRC_DIR}/zlib-${CT_ZLIB_VERSION}/configure" \
-        --prefix="${prefix}"                          \
-        --static                                      \
-        "${extra_config[@]}"
+    case "${host}" in
+    *-mingw32)
+        # zlib treats mingw host differently and requires using a different
+        # makefile rather than configure+make. It also does not support
+        # out-of-tree building.
+        cp -av "${CT_SRC_DIR}/zlib-${CT_ZLIB_VERSION}/." .
+        extra_make=( -f win32/Makefile.gcc \
+            PREFIX="${host}-" \
+            SHAREDLIB= \
+            IMPLIB= \
+            LIBRARY_PATH="${prefix}/lib" \
+            INCLUDE_PATH="${prefix}/include" \
+            BINARY_PATH="${prefix}/bin" \
+            prefix="${prefix}" \
+            )
+        ;;
+
+    *)
+        CT_DoLog EXTRA "Configuring zlib"
+
+        CT_DoExecLog CFG                                  \
+        CFLAGS="${cflags}"                                \
+        LDFLAGS="${ldflags}"                              \
+        CHOST="${host}"                                   \
+        ${CONFIG_SHELL}                                   \
+        "${CT_SRC_DIR}/zlib-${CT_ZLIB_VERSION}/configure" \
+            --prefix="${prefix}"                          \
+            --static                                      \
+            "${extra_config[@]}"
+        ;;
+    esac
 
     CT_DoLog EXTRA "Building zlib"
-    CT_DoExecLog ALL make ${JOBSFLAGS}
+    CT_DoExecLog ALL make "${extra_make[@]}" ${JOBSFLAGS}
 
     if [ "${CT_COMPLIBS_CHECK}" = "y" ]; then
         if [ "${host}" = "${CT_BUILD}" ]; then
             CT_DoLog EXTRA "Checking zlib"
-            CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+            CT_DoExecLog ALL make "${extra_make[@]}" -s test
         else
             # Cannot run host binaries on build in a canadian cross
             CT_DoLog EXTRA "Skipping check for zlib on the host"
@@ -107,7 +128,7 @@ do_zlib_backend() {
     fi
 
     CT_DoLog EXTRA "Installing zlib"
-    CT_DoExecLog ALL make install
+    CT_DoExecLog ALL make "${extra_make[@]}" install
 }
 
 fi # CT_ZLIB