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:info:build /usr/bin/clang -DHAVE_CONFIG_H -I. -I.. -I.. -I../util -DG_LOG_DOMAIN=\"gmime-tests\"  -D_REENTRANT -I/opt/ports/include/glib-2.0 -I/opt/ports/lib/glib-2.0/include -I/opt/ports/include   -I/opt/ports/include  -pipe -O2 -arch x86_64 -fno-strict-aliasing -MT test-pkcs7.o -MD -MP -MF .deps/test-pkcs7.Tpo -c -o test-pkcs7.o test-pkcs7.c
:info:build test-pkcs7.c:36:10: fatal error: 'gpg-error.h' file not found
:info:build #include <gpg-error.h>
:info:build          ^
:info:build 1 error generated.
:info:build make[3]: *** [test-pkcs7.o] Error 1

I cleaned gmime and tried building with --configure.compiler=llvm-gcc-4.2 but the same error occurs.

I've searched about but not found any solutions. 
Anyone have any suggestions to resolve this?
Thanks