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POWhy does Gnumake from parent directory behave differently?
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  1. POWhy does Gnumake from parent directory behave differently?
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    copied!<p>I am stumped as to why when I do a gnumake from the parent directory it behaves incorrectly, whereas, if I cd to the subdirectory and do gnumake it works correctly.</p> <p>In the parent makefile, I have a rule like this:</p> <pre><code>.PHONY: zlib-1.2.5 zlib-1.2.5: @ echo Issuing $(MAKE) in $@ ... pushd zlib-1.2.5; make; popd </code></pre> <p>I also tried it like this for last line above with the same failure:</p> <pre><code> make -C zlib-1.2.5 </code></pre> <p>Which gives different result than doing the same from the toplevel</p> <pre><code>pushd zlib-1.2.5; make; popd </code></pre> <p>There is a something from the parent makefile that is making its way into the subdirectory makefile and causing it to behave incorrectly, but I don't know how to find it.</p> <p>The symptom I see is that the subdirectory config generated makefile rule for zlib misses the dependencies and I get this result going straight to the ar without generating the .o(s) first:</p> <pre><code>cd ~/src; make zlib-1.2.5 CPPFLAGS_AUTO = &lt; &gt; Issuing make in zlib-1.2.5 ... pushd zlib-1.2.5; make; popd ~/src/zlib-1.2.5 ~/src make[1]: Entering directory `/disk2/user/src/zlib-1.2.5' ar rc libz.a adler32.o compress.o crc32.o deflate.o gzclose.o gzlib.o gzread.o gzwrite.o infback.o inffast.o inflate.o inftrees.o trees.o uncompr.o zutil.o ar: adler32.o: No such file or directory make[1]: *** [libz.a] Error 1 gcc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map -O3 -fPIC -D_LARGEFILE64_SOURCE=1 -o libz.so.1.2.5 adler32.lo compress.lo crc32.lo deflate.lo gzclose.lo gzlib.lo gzread.lo gzwrite.lo infback.lo inffast.lo inflate.lo inftrees.lo trees.lo uncompr.lo zutil.lo -lc -L. libz.a gcc: adler32.lo: No such file or directory gcc: compress.lo: No such file or directory gcc: crc32.lo: No such file or directory gcc: deflate.lo: No such file or directory [...] make[1]: *** [libz.so.1.2.5] Error 1 make[1]: Target `all' not remade because of errors. make[1]: Leaving directory `/disk2/user/src/zlib-1.2.5' ~/src </code></pre> <p>Versus from the zlib directory where it works correctly:</p> <pre><code>cd ~/src/zlib-1.2.5; make gcc -O3 -D_LARGEFILE64_SOURCE=1 -c -o example.o example.c gcc -O3 -D_LARGEFILE64_SOURCE=1 -c -o adler32.o adler32.c gcc -O3 -D_LARGEFILE64_SOURCE=1 -c -o compress.o compress.c gcc -O3 -D_LARGEFILE64_SOURCE=1 -c -o crc32.o crc32.c [...] gcc -O3 -D_LARGEFILE64_SOURCE=1 -c -o zutil.o zutil.c ar rc libz.a adler32.o compress.o crc32.o deflate.o gzclose.o gzlib.o gzread.o gzwrite.o infback.o inffast.o inflate.o inftrees.o trees.o uncompr.o zutil.o (ranlib libz.a || true) &gt;/dev/null 2&gt;&amp;1 gcc -O3 -D_LARGEFILE64_SOURCE=1 -o example example.o -L. libz.a gcc -O3 -D_LARGEFILE64_SOURCE=1 -c -o minigzip.o minigzip.c gcc -O3 -D_LARGEFILE64_SOURCE=1 -o minigzip minigzip.o -L. libz.a mkdir objs 2&gt;/dev/null || test -d objs gcc -O3 -fPIC -D_LARGEFILE64_SOURCE=1 -DPIC -c -o objs/adler32.o adler32.c mv objs/adler32.o adler32.lo mkdir objs 2&gt;/dev/null || test -d objs gcc -O3 -fPIC -D_LARGEFILE64_SOURCE=1 -DPIC -c -o objs/compress.o compress.c mv objs/compress.o compress.lo [...] mkdir objs 2&gt;/dev/null || test -d objs gcc -O3 -fPIC -D_LARGEFILE64_SOURCE=1 -DPIC -c -o objs/zutil.o zutil.c mv objs/zutil.o zutil.lo gcc -shared -Wl,-soname,libz.so.1,--version-script,zlib.map -O3 -fPIC -D_LARGEFILE64_SOURCE=1 -o libz.so.1.2.5 adler32.lo compress.lo crc32.lo deflate.lo gzclose.lo gzlib.lo gzread.lo gzwrite.lo infback.lo inffast.lo inflate.lo inftrees.lo trees.lo uncompr.lo zutil.lo -lc -L. libz.a rm -f libz.so libz.so.1 ln -s libz.so.1.2.5 libz.so ln -s libz.so.1.2.5 libz.so.1 rmdir objs gcc -O3 -D_LARGEFILE64_SOURCE=1 -o examplesh example.o -L. libz.so.1.2.5 gcc -O3 -D_LARGEFILE64_SOURCE=1 -o minigzipsh minigzip.o -L. libz.so.1.2.5 gcc -O3 -D_LARGEFILE64_SOURCE=1 -o example64 example64.o -L. libz.a gcc -O3 -D_LARGEFILE64_SOURCE=1 -o minigzip64 minigzip64.o -L. libz.a </code></pre>
 

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