Am 19.04.2013 14:14, schrieb Arnaud Charlet: > Can you clarify what problem you are trying to solve (e.g. by providing > a testcase, explaining what you are doing and you would expect)?
from http://bugs.debian.org/680292 Gnatmake calls gcc -shared in a way incompatible with --as-needed. Gprbuild uses a better ordering. -- bug.ads package Bug is end Bug; -- bug.gpr project Bug is for Library_Name use "bug"; for Library_Version use "libbug.so.1"; for Library_Kind use "dynamic"; for Library_Dir use "lib"; for Library_Options use ("-lncurses"); end Bug; $ mkdir lib $ gnatmake -v -Pbug ... /usr//bin/gcc-4.6 -shared ... -lncurses ... -lgnat-4.6 -Wl,-soname,libbug.so.1 /tmp/bug/bug.o ... $ gnatclean -Pbug ... $ gprbuild -v -Pbug ... /usr/bin/gcc-4.6 -shared ... -lgnat-4.6 ... -Wl,-soname,libbug.so.1 /tmp/bug/bug.o -lncurses ... When adding -Wl,--as-needed before -lncurses in Library_Options (or using GNU gold linker with default options), symbols from -lgnat-4.6 are ignored because they are not used by any object *yet*. In this minimal example, this is not a problem, but any useful library will use symbols from -lgnat-4.6.
