Win32: avoid using CFLAGS, just add define instead.
With CFLAGS set as in 7da71a7b141a, OpenSSL compilation drops various
non-important compiler options. To avoid this, a define is added
instead - OpenSSL is smart enough to recognize -D... in Configure
arguments.
diff --git a/misc/GNUmakefile b/misc/GNUmakefile
index 241cd4a..2a71ce0 100644
--- a/misc/GNUmakefile
+++ b/misc/GNUmakefile
@@ -82,8 +82,7 @@
--with-mail \
--with-stream \
--with-openssl=$(OBJS)/lib/$(OPENSSL) \
- --with-openssl-opt="no-asm no-tests \
- CFLAGS=-D_WIN32_WINNT=0x0501" \
+ --with-openssl-opt="no-asm no-tests -D_WIN32_WINNT=0x0501" \
--with-http_ssl_module \
--with-mail_ssl_module \
--with-stream_ssl_module
