Problem making GNU Make 3.81

[Tovrea, George W \(US SSA\)]

The following appears in a Makefile:

OBJS    = alldevices.o
# input/output devices
OBJS-$(CONFIG_ALSA_MUXER)   += alsa-audio-common.o alsa-audio-enc.o

The .c file being compiled contains

#define REGISTER_MUXER(X,x) { \
    extern AVOutputFormat x##_muxer; \
    if(CONFIG_##X##_MUXER)   av_register_output_format(&x##_muxer); }
...
    REGISTER_MUXER (ALSA, alsa);

This results in an "undeclared" error for CONFIG_ALSA_MUXER.

I am unfamiliar with the OBJS- line from the make file. What is this
suppose to do? It appears to do nothing in regards to the compile.

Any help would be appreciated.

Bill Tovrea

BAE Systems

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