shared libs with PIC not correctly build on MIPS

[Oliver Kowalke <oliver.kowalke@…>]

shared libraries build with bjam/boost.build on MIPS using position-independed code do not work correctly/generating segmentation fault. Compiling the library 'by hand' doesn't issue an error.

build libboost_fn with bjam: bjam toolset=gcc link=shared variant=debug cxxflags="-fPIC" --with-fn stage

build test app: g++ -g ./test.cpp -I./ -L./stage/lib -lboost_fn -Wl,-rpath=./stage/lib -lrt

./a.out with segementation fault at fn1.S: 'lw $t9, %call16(exit)($gp)'

build libbost_fn by hand: g++ -fPIC -g -I./ -c -Wall fn1.S g++ -shared -Wl,-soname,libboost_fn, -o libboost_fn fn1.o -lc

build test app: g++ -g ./test.cpp -I./ -L./ -lboost_fn -Wl,-rpath=./ -lrt

./a.out works and returns with exit code 2.

It seams to be a bug in bjam/boost.build.

[Oliver Kowalke <oliver.kowalke@…>]

header of test library

[Oliver Kowalke <oliver.kowalke@…>]

implementation for test library

[Oliver Kowalke <oliver.kowalke@…>]

test binary

[Oliver Kowalke <oliver.kowalke@…>]

correct command line for building libboost_fn:

g++ -shared -Wl,-soname,libboost_fn.so -o libboost_fn.so ./fn1.o -lc

[Oliver Kowalke <oliver.kowalke@…>]

corrected version of fn1.S

[Oliver Kowalke <oliver.kowalke@…>]

I guess that the object file for fn1.S is not compiled with -fPIC if build with bjam/boost.build

[Vladimir Prus]

(In [71622]) Set -fPIC for assembler complications, if necessary.

Fixes #5508.