osxcross/KNOWN_BUGS.md

OSXCROSS BUGS

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*** ISSUE: ***

GCH generation does not work with gcc or clang++-gstdc++/-foc-use-gcc-libstdc++ if -c or -x<lang>-header is not passed to the compiler.

Example:

$ o64-gcc test.h
Undefined symbols for architecture x86_64:
"_main", referenced from:
start in crt1.10.6.o

This is due to -Wl,-no_compact_unwind being passed to the compiler under the hood.

Example:

$ x86_64-apple-darwin14-base-gcc
x86_64-apple-darwin14-base-gcc: fatal error: no input files

$ x86_64-apple-darwin14-base-gcc -Wl,-no_compact_unwind
Undefined symbols for architecture x86_64:
"_main", referenced from:
start in crt1.10.6.o
ld: symbol(s) not found for architecture x86_64

*** WORKAROUND: ***

Add -c or -x<lang>-header to the compiler flags.

Example:

o64-clang++-gstdc++ test.hpp              # BAD
o64-clang++-gstdc++ -xc++-header test.hpp # OK
o64-clang++-gstdc++ test.hpp -c           # OK
o64-g++ test.hpp -c                       # OK

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