From c849b3f00b43a2ef14b872642a31d755fd8e513f Mon Sep 17 00:00:00 2001
From: Paul Steinbrecher <tornado1717@gmail.com>
Date: Wed, 8 Aug 2018 17:23:15 -0600
Subject: [PATCH] Update support for Cygwin 2.10.0 without X11. Based on MSYS
 toolchain config.

---
 config/Makefile.cygwin     |  3 ++-
 config/Makefile.cygwin-x11 | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 config/Makefile.cygwin-x11

diff --git a/config/Makefile.cygwin b/config/Makefile.cygwin
index bc7e2fd..f4be222 100644
--- a/config/Makefile.cygwin
+++ b/config/Makefile.cygwin
@@ -4,9 +4,10 @@ GLEW_DEST ?= /usr
 CC := cc
 LD := cc
 LN :=
+CFLAGS.EXTRA += -D_WIN32
 LDFLAGS.EXTRA =
 LIBDIR = $(GLEW_DEST)/lib
-LDFLAGS.GL = -lGL -lX11
+LDFLAGS.GL = -lOpenGL32 -mwindows
 LDFLAGS.STATIC = -Wl,-Bstatic
 LDFLAGS.DYNAMIC = -Wl,-Bdynamic
 WARN = -Wall -W
diff --git a/config/Makefile.cygwin-x11 b/config/Makefile.cygwin-x11
new file mode 100644
index 0000000..bc7e2fd
--- /dev/null
+++ b/config/Makefile.cygwin-x11
@@ -0,0 +1,19 @@
+NAME = GLEW
+GLEW_DEST ?= /usr
+# use gcc for linking, with ld it does not work
+CC := cc
+LD := cc
+LN :=
+LDFLAGS.EXTRA =
+LIBDIR = $(GLEW_DEST)/lib
+LDFLAGS.GL = -lGL -lX11
+LDFLAGS.STATIC = -Wl,-Bstatic
+LDFLAGS.DYNAMIC = -Wl,-Bdynamic
+WARN = -Wall -W
+POPT = -O2
+BIN.SUFFIX = .exe
+LIB.SONAME    = cyg$(NAME)-$(GLEW_MAJOR)-$(GLEW_MINOR).dll
+LIB.DEVLNK    = lib$(NAME).dll.a
+LIB.SHARED    = cyg$(NAME)-$(GLEW_MAJOR)-$(GLEW_MINOR).dll
+LIB.STATIC    = lib$(NAME).a
+LDFLAGS.SO    = -shared -Wl,--out-implib,lib/$(LIB.DEVLNK)