[slang-devel] Honoring compilation env vars in slcfitsio

[Rafael Laboissière <rafael@xxxxxxxxxx>]

Hello,

When building slpvm for Debian, we should ensure that the environment 
variable CFLAGS, CPPFLAGS, and LDFLAGS will be 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.

The file attached to this message is being currently used in Debian. 
Please, consider applying it (or a variation of it) for the next release.

Best,

Rafael Laboissière

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

Description: Honor the environment variable 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: 2021-11-15

--- slpvm-0.1.5.orig/src/Makefile.in
+++ slpvm-0.1.5/src/Makefile.in
@@ -61,7 +61,7 @@ all: $(MODULES)
 # Put Rules to create the modules here
 #---------------------------------------------------------------------------
 pvm-module.so: pvm-module.c
-	$(CC_SHARED) $(INCS) pvm-module.c -o pvm-module.so $(LIBS)
+	$(CC_SHARED) $(CPPFLAGS) $(INCS) $(LDFLAGS) pvm-module.c -o pvm-module.so $(LIBS)
 #---------------------------------------------------------------------------
 # Regression tests
 #---------------------------------------------------------------------------