[slang-devel] Honoring compilation env vars in slxfig

[Rafael Laboissière <rafael@xxxxxxxxxx>]

Hello,

When building slxfig for Debian, we should ensure that the environment 
variable CPPFLAGS, and LDFLAGS are honored. This is required in Debian, 
because the hardening flags [*] -D_FORTIFY_SOURCE=2 and -Wl,-z,relro must 
be used in the compilation and linking of C files.

Best,

Rafael Laboissière

[*] https://wiki.debian.org/Hardening

Description: Honor the environment variables CPPFLAGS and LDFLAGS
 This is required in Debian, such that hardening flags like
 -D_FORTIFY_SOURCE=2 and -Wl,-z,relro are used in the compilation
 and linking of C files.
Author: Rafael Laboissière <rafael@xxxxxxxxxx>
Forwarded: no
Last-Update: 2021-11-17

--- slxfig-0.2.0~.131.orig/src/Makefile.in
+++ slxfig-0.2.0~.131/src/Makefile.in
@@ -66,7 +66,7 @@ all: $(MODULES) xfig.sl
 # Put Rules to create the modules here
 #---------------------------------------------------------------------------
 gcontour-module.so: gcontour-module.c
-	$(CC_SHARED) $(INCS) gcontour-module.c -o gcontour-module.so $(LIBS)
+	$(CC_SHARED) $(CPPFLAGS) $(INCS) $(LDFLAGS) gcontour-module.c -o gcontour-module.so $(LIBS)
 xfig.sl: ../changes.txt
 	if [ -x $(UPDATE_VERSION_SCRIPT) ]; then \
 	  $(UPDATE_VERSION_SCRIPT) ../changes.txt xfig.sl; \