如何在Autotools中设置包含路径？

Question

I created a learning project with this directory structure:

    top_srcdir
      /   \   
    src   build
    / \
src1   src2

Directory src contains file main.c with this content:

#include "src1/foo.h"

#include "src2/bar.h"
int main()
{
foo();
bar();
return 0;
}

src/src1/foo.c contains:

#include "src1/foo.h"
//some code

src/src2/bar.c contains:

#include "src2/bar.h"
//some code

Makefile.am contains:

bin_PROGRAMS = sample
sample_SOURCES = src/main.c src/src1/foo.c src/src2/bar.c

When I change the woring directory to build and execute ../configure && make , the make step fails with

../src/src1/foo.c fatal error: src1/foo.h: No such file or directory.

What value should I provide for variable AM_CPPFLAGS so that this error does not occur?

Answer 1

You really don't need to set AM_CPPFLAGS:

bin_PROGRAMS = sample
sample_SOURCES = src/main.c src/src1/foo.c src/src2/bar.c
sample_CPPFLAGS = -I src

Should work.