[FFmpeg-devel] [RFC] allow overriding of $nm

[Reimar Döffinger]

Hello,
some systems like OpenBSD lack a POSIX-conforming nm tool.
Now obviously I am not motivated to try to get them fixed,
so one possibility is to allow changing the selected nm tool.
This can either be used in combination with your own "fixed" nm but
also just be misused e.g. like this:
--nm="echo _ff_extern #"
or in case of OpenBSD just
--nm=true
Another possibility would be to allow overriding the extern prefix
directly.
So, what are the opinions on attached patch?

Greetings,
Reimar D?ffinger
-------------- next part --------------
Index: configure
===================================================================
--- configure	(revision 16087)
+++ configure	(working copy)
@@ -129,6 +129,7 @@
   echo "  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS [$LDFLAGS]"
   echo "  --extra-libs=ELIBS       add ELIBS [$ELIBS]"
   echo "  --extra-version=STRING   version string suffix []"
+  echo "  --nm=NM                  use nm tool [$nm]"
   echo "  --build-suffix=SUFFIX    library name suffix []"
   echo "  --arch=ARCH              select architecture [$arch]"
   echo "  --cpu=CPU                select the minimum required CPU (affects"
@@ -919,6 +920,7 @@
     host_ldflags
     host_libs
     logfile
+    nm
     source_path
     target_exec
     target_os
@@ -1097,7 +1099,7 @@
 host_cc_default="gcc"
 yasmexe="yasm"
 ar="ar"
-nm="nm"
+nm_default="nm"
 ranlib="ranlib"
 strip="strip"
 ln_s="ln -sf"
@@ -1265,13 +1267,14 @@
 cc_default="${cross_prefix}${cc_default}"
 yasmexe="${cross_prefix}${yasmexe}"
 ar="${cross_prefix}${ar}"
-nm="${cross_prefix}${nm}"
+nm_default="${cross_prefix}${nm}"
 ranlib="${cross_prefix}${ranlib}"
 strip="${cross_prefix}${strip}"
 
 set_default cc
 enabled cross_compile || host_cc_default=$cc
 set_default host_cc
+set_default nm
 
 # set temporary file name
 if test ! -z "$TMPDIR" ; then