Compiler quietening. Bug 2983

[exim.git] / src / OS / Makefile-Linux

diff --git a/src/OS/Makefile-Linux b/src/OS/Makefile-Linux
index 8b721410e7b11a96a5206a75fe2059d8898abd18..dfb2fa8e7046ef70e038f50630083b96361b5953 100644 (file)
--- a/src/OS/Makefile-Linux
+++ b/src/OS/Makefile-Linux
@@ -1,5 +1,10 @@
 # Exim: OS-specific make file for Linux. This is for modern Linuxes,
 # which use libc6.
 # Exim: OS-specific make file for Linux. This is for modern Linuxes,
 # which use libc6.

+# Copyright (c) The Exim Maintainers 2020
+#
+# For Linux, we assume GNU Make; at time of writing, the only extension
+# used is ?= which is actually portable to other maintained Make variants,
+# just is not POSIX.

 
 HAVE_ICONV=yes
 
 
 HAVE_ICONV=yes
 


@@ -8,13 +13,16 @@ CHOWN_COMMAND=look_for_it
 CHGRP_COMMAND=look_for_it
 CHMOD_COMMAND=look_for_it
 
 CHGRP_COMMAND=look_for_it
 CHMOD_COMMAND=look_for_it
 

-CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
-CFLAGS_DYNAMIC=-shared -rdynamic
+# The system cc may be gcc or clang; do not force gcc
+CC=cc
+# Preserve CFLAGS and CFLAGS_DYNAMIC from the caller/environment
+CFLAGS ?= -O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
+CFLAGS_DYNAMIC ?= -shared -rdynamic

 
 DBMLIB = -ldb
 USE_DB = yes
 
 
 DBMLIB = -ldb
 USE_DB = yes
 

-LIBS = -lnsl -lcrypt -lm
+LIBS = -lcrypt -lm

 LIBRESOLV = -lresolv
 
 X11=/usr/X11R6
 LIBRESOLV = -lresolv
 
 X11=/usr/X11R6