Due to the fact that I have spent the last two and a half hours trying
to find a place where to submit a bug report via the Trac system
(https://community.openvpn.net/openvpn) - and failing, miserably so - I
am submitting it here!
In this version of OpenVPN, the Makefiles for the above plugins contain
hard-coded compile/link parameters, which prevent cross compilation.
For example, during building openvpn-down-root.so the value of the c/c++
compiler is assumed to be gcc, along with various other settings (CLFAGS
being set as "-O2 and -Wall" and LDFLAGS as "-shared -Wl,-soname"),
disregarding the rest, therefore ruining any possibility of cross
compilation as the file produced will have the same attributes as the
build system!
If I build OpenVPN on x86_64-based machine to be executed on i686 the
two Makefiles will produce code for x86_64, despite the openvpn
executable being produced, correctly, for the i686 host system. Thus,
the produced 'package' will introduce at least 2 additional - and highly
undesired - dependencies, namely: glibc (x86_64) and libpam (x86_64).
To prevent that I am enclosing a patch, which although fixes this
problem I am of the opinion that it could be optimised further to
co-exist with the rest of the build system and be auto-generated, though
I will leave that with the developers to decide what is the best way to
proceed and fix this bug.
diff -NurBb openvpn-2.1.4/plugin/auth-pam/Makefile a/plugin/auth-pam/Makefile
--- openvpn-2.1.4/plugin/auth-pam/Makefile 2010-10-21 18:37:51.000000000
+0100
+++ a/plugin/auth-pam/Makefile 2010-12-26 01:57:45.345754000 +0000
@@ -15,16 +15,14 @@
# This directory is where we will look for openvpn-plugin.h
INCLUDE=-I../..
-CC_FLAGS=-O2 -Wall -DDLOPEN_PAM=$(DLOPEN_PAM)
-
openvpn-auth-pam.so : auth-pam.o pamdl.o
- gcc ${CC_FLAGS} -fPIC -shared -Wl,-soname,openvpn-auth-pam.so -o
openvpn-auth-pam.so auth-pam.o pamdl.o -lc $(LIBPAM)
+ ${CC} -DDLOPEN_PAM=$(DLOPEN_PAM) -fPIC -shared ${LDFLAGS}
-Wl,-soname,openvpn-auth-pam.so -o openvpn-auth-pam.so auth-pam.o pamdl.o -lc
$(LIBPAM)
auth-pam.o : auth-pam.c pamdl.h
- gcc ${CC_FLAGS} -fPIC -c ${INCLUDE} auth-pam.c
+ ${CC} ${CFLAGS} -DDLOPEN_PAM=$(DLOPEN_PAM) -fPIC -c ${INCLUDE}
auth-pam.c
pamdl.o : pamdl.c pamdl.h
- gcc ${CC_FLAGS} -fPIC -c ${INCLUDE} pamdl.c
+ ${CC} ${CFLAGS} -DDLOPEN_PAM=$(DLOPEN_PAM) -fPIC -c ${INCLUDE} pamdl.c
clean :
rm -f *.o *.so
diff -NurBb openvpn-2.1.4/plugin/down-root/Makefile a/plugin/down-root/Makefile
--- openvpn-2.1.4/plugin/down-root/Makefile 2010-10-21 18:37:51.000000000
+0100
+++ a/plugin/down-root/Makefile 2010-12-26 01:58:07.976755000 +0000
@@ -5,13 +5,11 @@
# This directory is where we will look for openvpn-plugin.h
INCLUDE=-I../..
-CC_FLAGS=-O2 -Wall
-
down-root.so : down-root.o
- gcc ${CC_FLAGS} -fPIC -shared -Wl,-soname,openvpn-down-root.so -o
openvpn-down-root.so down-root.o -lc
+ ${CC} -fPIC -shared ${LDFLAGS} -Wl,-soname,openvpn-down-root.so -o
openvpn-down-root.so down-root.o -lc
down-root.o : down-root.c
- gcc ${CC_FLAGS} -fPIC -c ${INCLUDE} down-root.c
+ ${CC} ${CFLAGS} -fPIC -c ${INCLUDE} down-root.c
clean :
rm -f *.o *.so
