optimisation flag -Os instead of -O3.

a bug in emcc that won’t let us discover SDL.h.

no known regressions yet.

memory leak in OS X llvm-g++.

to external so as to avoid some autocompletion collisions with "configure".

before it also runs on Linux or OS X.

the C compiler (the Android build script did that).

but we can now create shared objects for each project; only the testsuite
is not building properly because of issues with STLport, and EglApp is
deactivated because AndroidApp should have precedence.

parallel builds accordingly.

appear shorter on the web page.

fail the build (if eg. we try to build an amd64 binary on i386).

g++ understands -lcaca directly; also add -DCACA_STATIC to the default flags.

for Win64.

--host=i386 or --host=x86_64.

build host.

and the OS X port.

on the autobuilders doesn't support it yet.

mingw64 on mingw32).

add set -e to the build-mingw scripts to catch possible regressions.

and SDL_Mixer are needed and are a lot harder to build.