have_func: checking for mmap() in sys/mman.h... -------------------- yes

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include     -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: int main(int argc, char **argv)
4: {
5:   return 0;
6: }
/* end */

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include     -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <sys/mman.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     printf("%p", &t);
11:   }
12: 
13:   return 0;
14: }
15: int t(void) { void ((*volatile p)()); p = (void ((*)()))mmap; return !p; }
/* end */

--------------------

have_func: checking for munmap() in sys/mman.h... -------------------- yes

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include     -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <sys/mman.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     printf("%p", &t);
11:   }
12: 
13:   return 0;
14: }
15: int t(void) { void ((*volatile p)()); p = (void ((*)()))munmap; return !p; }
/* end */

--------------------

have_func: checking for mremap() in sys/mman.h... -------------------- yes

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <sys/mman.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     printf("%p", &t);
11:   }
12: 
13:   return 0;
14: }
15: int t(void) { void ((*volatile p)()); p = (void ((*)()))mremap; return !p; }
/* end */

--------------------

have_header: checking for linux/tcp.h... -------------------- yes

"gcc -E -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <linux/tcp.h>
/* end */

--------------------

have_func: checking for getpagesize() in unistd.h... -------------------- yes

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE  -D_BSD_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: #include <unistd.h>
 4: 
 5: /*top*/
 6: extern int t(void);
 7: int main(int argc, char **argv)
 8: {
 9:   if (argc > 1000000) {
10:     printf("%p", &t);
11:   }
12: 
13:   return 0;
14: }
15: int t(void) { void ((*volatile p)()); p = (void ((*)()))getpagesize; return !p; }
/* end */

--------------------

have_func: checking for rb_thread_blocking_region()... -------------------- no

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE  -D_BSD_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
conftest.c: In function ‘t’:
conftest.c:13:57: error: ‘rb_thread_blocking_region’ undeclared (first use in this function)
 int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_thread_blocking_region; return !p; }
                                                         ^
conftest.c:13:57: note: each undeclared identifier is reported only once for each function it appears in
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: /*top*/
 4: extern int t(void);
 5: int main(int argc, char **argv)
 6: {
 7:   if (argc > 1000000) {
 8:     printf("%p", &t);
 9:   }
10: 
11:   return 0;
12: }
13: int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_thread_blocking_region; return !p; }
/* end */

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE  -D_BSD_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
/tmp/cc88AVVk.o: In function `t':
/home/piousbox/projects/microsites/ish_lib_manager/test/dummy/vendor/bundle/ruby/2.3.0/gems/raindrops-0.16.0/ext/raindrops/conftest.c:14: undefined reference to `rb_thread_blocking_region'
collect2: error: ld returned 1 exit status
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: /*top*/
 4: extern int t(void);
 5: int main(int argc, char **argv)
 6: {
 7:   if (argc > 1000000) {
 8:     printf("%p", &t);
 9:   }
10: 
11:   return 0;
12: }
13: extern void rb_thread_blocking_region();
14: int t(void) { rb_thread_blocking_region(); return 0; }
/* end */

--------------------

have_func: checking for rb_thread_io_blocking_region()... -------------------- yes

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE  -D_BSD_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
conftest.c: In function ‘t’:
conftest.c:13:57: error: ‘rb_thread_io_blocking_region’ undeclared (first use in this function)
 int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_thread_io_blocking_region; return !p; }
                                                         ^
conftest.c:13:57: note: each undeclared identifier is reported only once for each function it appears in
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: /*top*/
 4: extern int t(void);
 5: int main(int argc, char **argv)
 6: {
 7:   if (argc > 1000000) {
 8:     printf("%p", &t);
 9:   }
10: 
11:   return 0;
12: }
13: int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_thread_io_blocking_region; return !p; }
/* end */

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE  -D_BSD_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: /*top*/
 4: extern int t(void);
 5: int main(int argc, char **argv)
 6: {
 7:   if (argc > 1000000) {
 8:     printf("%p", &t);
 9:   }
10: 
11:   return 0;
12: }
13: extern void rb_thread_io_blocking_region();
14: int t(void) { rb_thread_io_blocking_region(); return 0; }
/* end */

--------------------

checking for GCC 4+ atomic builtins... -------------------- yes

"gcc -o conftest -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/x86_64-linux -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0/ruby/backward -I/home/piousbox/.rbenv/versions/2.3.1/include/ruby-2.3.0 -I. -I/home/piousbox/.rbenv/versions/2.3.1/include    -D_GNU_SOURCE  -D_BSD_SOURCE   -O3 -fno-fast-math -ggdb3 -Wall -Wextra -Wno-unused-parameter -Wno-parentheses -Wno-long-long -Wno-missing-field-initializers -Wunused-variable -Wpointer-arith -Wwrite-strings -Wdeclaration-after-statement -Wimplicit-function-declaration -Wdeprecated-declarations -Wno-packed-bitfield-compat conftest.c  -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L. -L/home/piousbox/.rbenv/versions/2.3.1/lib  -fstack-protector -rdynamic -Wl,-export-dynamic     -Wl,-R/home/piousbox/.rbenv/versions/2.3.1/lib -L/home/piousbox/.rbenv/versions/2.3.1/lib -lruby-static  -lpthread -lgmp -ldl -lcrypt -lm   -lc"
checked program was:
/* begin */
 1: #include "ruby.h"
 2: 
 3: int main(int argc, char * const argv[]) {
 4:         unsigned long i = 0;
 5:         __sync_lock_test_and_set(&i, 0);
 6:         __sync_lock_test_and_set(&i, 1);
 7:         __sync_bool_compare_and_swap(&i, 0, 1);
 8:         __sync_add_and_fetch(&i, argc);
 9:         __sync_sub_and_fetch(&i, argc);
10:         return 0;
11: }
/* end */

--------------------