Build of libfaketime with musl toolchain

# [tuscan]
# Server = file:///var/cache/pacman/pkg/

# :: Synchronizing package databases...
# downloading tuscan.db...

# /sysroot/lib
# /sysroot/share
# /sysroot/bin
# /sysroot/include
# /sysroot/libexec

# ==> Making package: libfaketime 0.9.6-2 (Tue Apr 4 23:02:36 UTC 2017)
# ==> Checking runtime dependencies...
# ==> Checking buildtime dependencies...
# ==> WARNING: Using existing $srcdir/ tree
# ==> Starting build()...
# make -C src all
# make[1]: Entering directory '/tmp/libfaketime/src/libfaketime-0.9.6/src'
# clang -o libfaketime.o -c -std=gnu99 -Wall -Wextra -Werror -DFAKE_STAT -DFAKE_SLEEP -DFAKE_TIMERS -DFAKE_INTERNAL_CALLS -fPIC -DPREFIX='"'/usr'"' -DLIBDIRNAME='"'/lib/faketime'"' libfaketime.c
# clang -o libfaketimeMT.o -c -std=gnu99 -Wall -Wextra -Werror -DFAKE_STAT -DFAKE_SLEEP -DFAKE_TIMERS -DFAKE_INTERNAL_CALLS -fPIC -DPREFIX='"'/usr'"' -DLIBDIRNAME='"'/lib/faketime'"' libfaketime.c
# clang -o faketime -std=gnu99 -Wall -Wextra -Werror -DFAKE_STAT -DFAKE_SLEEP -DFAKE_TIMERS -DFAKE_INTERNAL_CALLS -fPIC -DPREFIX='"'/usr'"' -DLIBDIRNAME='"'/lib/faketime'"' faketime.c -Wl,--version-script=libfaketime.map -lpthread -lrt
# libfaketime.c:312:72: error: while loop has empty body [-Werror,-Wempty-body]
# DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_REALTIME, &systime->real));
# ^
# libfaketime.c:312:72: error: while loop has empty body [-Werror,-Wempty-body]
# DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_REALTIME, &systime->real));
# ^
# libfaketime.clibfaketime.c::312312::7272:: note: noteput the semicolon on a separate line to silence this warning
# libfaketime.c:313:72: error: while loop has empty body [-Werror,-Wempty-body]
# DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_MONOTONIC, &systime->mon));
# ^
# libfaketime.c:313:72: note: put the semicolon on a separate line to silence this warning
# : put the semicolon on a separate line to silence this warning
# libfaketime.c:313:72: error: while loop has empty body [-Werror,-Wempty-body]
# DONT_FAKE_TIME((*real_clock_gettime)(CLOCK_MONOTONIC, &systime->mon));
# ^
# libfaketime.c:313:72: note: put the semicolon on a separate line to silence this warning
# libfaketime.c:1430:29: error: implicit declaration of function 'dlvsym' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
# real_timer_settime_22 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.2");
# ^
# libfaketime.c:1430:29: note: did you mean 'dlsym'?
# /sysroot/include/dlfcn.h:25:8: note: 'dlsym' declared here
# void *dlsym(void *__restrict, const char *__restrict);
# ^
# libfaketime.c:1430:25: error: incompatible integer to pointer conversion assigning to 'int (*)(int, int, const struct itimerspec *, struct itimerspec *)' from 'int' [-Werror,-Wint-conversion]
# real_timer_settime_22 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.2");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# libfaketime.c:1431:26: error: incompatible integer to pointer conversion assigning to 'int (*)(timer_t, int, const struct itimerspec *, struct itimerspec *)' (aka 'int (*)(void *, int, const struct itimerspec *, struct itimerspec *)') from 'int' [-Werror,-Wint-conversion]
# real_timer_settime_233 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.3.3");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# libfaketime.c:1436:25: error: incompatible integer to pointer conversion assigning to 'int (*)(int, struct itimerspec *)' from 'int' [-Werror,-Wint-conversion]
# real_timer_gettime_22 = dlvsym(RTLD_NEXT, "timer_gettime","GLIBC_2.2");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# libfaketime.c:1437:26: error: incompatible integer to pointer conversion assigning to 'int (*)(timer_t, struct itimerspec *)' (aka 'int (*)(void *, struct itimerspec *)') from 'int' [-Werror,-Wint-conversion]
# real_timer_gettime_233 = dlvsym(RTLD_NEXT, "timer_gettime","GLIBC_2.3.3");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# 7 errors generated.
# make[1]: *** [Makefile:88: libfaketime.o] Error 1
# make[1]: *** Waiting for unfinished jobs....
# libfaketime.c:1430:29: error: implicit declaration of function 'dlvsym' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
# real_timer_settime_22 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.2");
# ^
# libfaketime.c:1430:29: note: did you mean 'dlsym'?
# /sysroot/include/dlfcn.h:25:8: note: 'dlsym' declared here
# void *dlsym(void *__restrict, const char *__restrict);
# ^
# libfaketime.c:1430:25: error: incompatible integer to pointer conversion assigning to 'int (*)(int, int, const struct itimerspec *, struct itimerspec *)' from 'int' [-Werror,-Wint-conversion]
# real_timer_settime_22 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.2");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# libfaketime.c:1431:26: error: incompatible integer to pointer conversion assigning to 'int (*)(timer_t, int, const struct itimerspec *, struct itimerspec *)' (aka 'int (*)(void *, int, const struct itimerspec *, struct itimerspec *)') from 'int' [-Werror,-Wint-conversion]
# real_timer_settime_233 = dlvsym(RTLD_NEXT, "timer_settime","GLIBC_2.3.3");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# libfaketime.c:1436:25: error: incompatible integer to pointer conversion assigning to 'int (*)(int, struct itimerspec *)' from 'int' [-Werror,-Wint-conversion]
# real_timer_gettime_22 = dlvsym(RTLD_NEXT, "timer_gettime","GLIBC_2.2");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# libfaketime.c:1437:26: error: incompatible integer to pointer conversion assigning to 'int (*)(timer_t, struct itimerspec *)' (aka 'int (*)(void *, struct itimerspec *)') from 'int' [-Werror,-Wint-conversion]
# real_timer_gettime_233 = dlvsym(RTLD_NEXT, "timer_gettime","GLIBC_2.3.3");
# ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# 7 errors generated.
# make[1]: *** [Makefile:88: libfaketimeMT.o] Error 1
# make[1]: Leaving directory '/tmp/libfaketime/src/libfaketime-0.9.6/src'
# make: *** [Makefile:7: all] Error 2
# ==> ERROR: A failure occurred in build().
# Aborting...