Old gcc and clang do not handle constructor arguments, finally fix #875 as discussed there, using the fedora patch

to migitate performance problems caused by #1052 and #1299 as seen in #1461

Even if we're directly using the win32 threading driver and not pthreads,
pthread_atfork still works fine to register a pre-fork handler, and is
necessary to restore the threading server to a pre-initialized state.

... as the "allocation" code jumped to now does UNLOCK_COMMAND instead of blas_unlock

Before this commit, the "position < NUM_BUFFERS" loop condition from
blas_memory_free will be completely optimized away by GCC. This is
because the condition can only be false after undefined behavior has
already been invoked (reading past the end of an array). As a
consequence of this bug, GCC also removes the subsequent if statement
and all the code after the error label because all of it is dead.

This commit switches the loop condition around so it works as intended.

Ref. #995, may possibly help solve issues seen in 660,883

USE NPROCESSOR_CONF instaed of NPORCESSOR_ONLN

to determine the number of CPU. In ARM platform,
online CPU will increasing when there is more workload.
while configure cpu is the max number of CPU.

I cannot reproduce SEGFAULT of lapack-test with default stack size
on ARM Linux.

Let openblas_get_num_threads return the number of active threads

illumos fixes

... not the number of allocated threads.

Close #760

Conflicts:
	driver/others/memory.c

Conflicts:
	driver/others/memory.c

should fix issue #597

e.g.
make HOSTCC=gcc CC=arm-linux-androideabi-gcc NO_LAPACK=1 TARGET=ARMV7

In Android NDK, it uses armeabi-v7a-hard ABI.
TARGET_CFLAGS += -mhard-float -D_NDK_MATH_NO_SOFTFP=1
TARGET_LDFLAGS += -Wl,--no-warn-mismatch -lm_hard
For more information, please check hard-float example at
android_ndk/tests/device/hard-float/jni/.

Refactor such that you can build with ALLOC_SHM=0. HughTLB
implicity depends on ALLOC_SHM=1. This patch allows
building for Android NDK r10d.

For gemv_t, directly use malloc to create the buffer.

Fix race condition during shutdown causing a crash in
gotoblas_set_affinity().

get_nprocs() is a GNU convenience function equivalent to POSIX2008
sysconf(_SC_NPROCESSORS_ONLN); the latter should be available in unistd.h
on any current *nix. (OS X supports this call since 10.5, and FreeBSD
currently supports it. But this commit does not change FreeBSD or OS X
versions.)