rts: unrust 'libbfd' debug symbols parser

For quite a long while you might have seen such ./configure output:

checking bfd.h usability... yes
checking bfd.h presence... yes
checking for bfd.h... yes
...
checking for bfd_uncompress_section_contents in -lbfd... no

which means very interesting debug bit in rts (+RTS -Di) is disabled. It's because most of functions in bfd.h are actually macros, thus test fails: config.log:

configure:9545: checking for bfd_uncompress_section_contents in -lbfd
configure:9570: x86_64-pc-linux-gnu-gcc -o conftest -march=corei7-avx -mtune=corei7-avx -O2 -pipe -fdiagnostics-show-option -frecord-gcc-switches -ggdb3 -march=corei7-avx -march=corei7-avx -m
tune=corei7-avx -mtune=corei7-avx -ggdb3 -fno-stack-protector -Wa,--noexecstack -Wa,--noexecstack -fno-stack-protector  -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu -Wl,--hash-size=31 -Wl,--r
educe-memory-overheads conftest.c -lbfd  -liberty  >&5
/tmp/portage/dev-lang/ghc-7.6.3-r1/temp/ccCEvDZ7.o: In function `main':
/tmp/portage/dev-lang/ghc-7.6.3-r1/work/ghc-7.6.3/conftest.c:99: undefined reference to `bfd_uncompress_section_contents'

We don't use that function anyways, thus i've picked bfd_init.

Trac metadata

Trac field	Value
Version	7.6.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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