package configuration for libffi is not found
have_header: checking for ffi.h... -------------------- no

"gcc -E -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle     -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  conftest.c -o conftest.i"
conftest.c:3:17: error: ffi.h: No such file or directory
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <ffi.h>
/* end */

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

have_header: checking for ffi/ffi.h... -------------------- no

"gcc -E -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle     -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  conftest.c -o conftest.i"
conftest.c:3:21: error: ffi/ffi.h: No such file or directory
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <ffi/ffi.h>
/* end */

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

["sh", "../../.././ext/fiddle/libffi-3.2.1/configure", "--srcdir=../../.././ext/fiddle/libffi-3.2.1", "--disable-shared", "--host=x86_64-unknown-freebsd9.1", "--enable-builddir=x86_64-freebsd9.1", "CC=gcc", "CFLAGS= -O3 -fno-fast-math -ggdb3 ", "CXX=g++", "CXXFLAGS= -O3 -fno-fast-math -ggdb3 ", "LD=ld", "LDFLAGS=-L. -fstack-protector -rdynamic  -L../../.. "] in {:chdir=>"libffi-3.2.1"}
checking build system type... x86_64-unknown-freebsd9.1
checking host system type... x86_64-unknown-freebsd9.1
checking target system type... x86_64-unknown-freebsd9.1
checking for gsed... sed
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for x86_64-unknown-freebsd9.1-strip... no
checking for strip... strip
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... nawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for x86_64-unknown-freebsd9.1-gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking dependency style of gcc... gcc3
checking whether gcc and cc understand -c and -o together... yes
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/bin/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by gcc... ld
checking if the linker (ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 196608
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... no
checking how to convert x86_64-unknown-freebsd9.1 file names to x86_64-unknown-freebsd9.1 format... func_convert_file_noop
checking how to convert x86_64-unknown-freebsd9.1 file names to toolchain format... func_convert_file_noop
checking for ld option to reload object files... -r
checking for x86_64-unknown-freebsd9.1-objdump... no
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for x86_64-unknown-freebsd9.1-dlltool... no
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for x86_64-unknown-freebsd9.1-ar... no
checking for ar... ar
checking for archiver @FILE support... no
checking for x86_64-unknown-freebsd9.1-strip... strip
checking for x86_64-unknown-freebsd9.1-ranlib... no
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for sysroot... no
checking for x86_64-unknown-freebsd9.1-mt... no
checking for mt... mt
checking if mt is a manifest tool... no
checking how to run the C preprocessor... gcc -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC -DPIC
checking if gcc PIC flag -fPIC -DPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (ld) supports shared libraries... yes
checking dynamic linker characteristics... freebsd9.1 ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... no
checking whether to build static libraries... yes
checking how to run the C++ preprocessor... g++ -E
checking for ld used by g++... ld
checking if the linker (ld) is GNU ld... yes
checking whether the g++ linker (ld) supports shared libraries... yes
checking for g++ option to produce PIC... -fPIC -DPIC
checking if g++ PIC flag -fPIC -DPIC works... yes
checking if g++ static flag -static works... yes
checking if g++ supports -c -o file.o... yes
checking if g++ supports -c -o file.o... (cached) yes
checking whether the g++ linker (ld) supports shared libraries... yes
checking dynamic linker characteristics... freebsd9.1 ld.so
checking how to hardcode library paths into programs... immediate
checking size of size_t... 8
checking for C compiler vendor... gnu
checking CFLAGS for maximum warnings... -Wall
checking whether to enable maintainer-specific portions of Makefiles... no
checking sys/mman.h usability... yes
checking sys/mman.h presence... yes
checking for sys/mman.h... yes
checking for mmap... yes
checking for mkostemp... no
checking for sys/mman.h... (cached) yes
checking for mmap... (cached) yes
checking whether read-only mmap of a plain file works... yes
checking whether mmap from /dev/zero works... yes
checking for MAP_ANON(YMOUS)... yes
checking whether mmap with MAP_ANON(YMOUS) works... yes
checking for ANSI C header files... (cached) yes
checking for memcpy... yes
checking for size_t... yes
checking for working alloca.h... no
checking for alloca... yes
checking size of double... 8
checking size of long double... 16
checking whether byte ordering is bigendian... no
checking assembler .cfi pseudo-op support... yes
checking assembler supports pc related relocs... yes
checking assembler .ascii pseudo-op support... yes
checking assembler .string pseudo-op support... yes
checking for _ prefix in compiled symbols... no
checking toolchain supports unwind section type... yes
checking whether .eh_frame section should be read-only... yes
checking for __attribute__((visibility("hidden")))... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating include/Makefile
config.status: creating include/ffi.h
config.status: creating Makefile
config.status: creating testsuite/Makefile
config.status: creating man/Makefile
config.status: creating libffi.pc
config.status: creating fficonfig.h
config.status: fficonfig.h is unchanged
config.status: linking src/x86/ffitarget.h to include/ffitarget.h
config.status: executing buildir commands
config.status: keeping top_srcdir/Makefile from earlier configure
config.status: build in x86_64-freebsd9.1 (HOST=www3433.sakura.ne.jp)
config.status: executing depfiles commands
config.status: executing libtool commands
config.status: executing include commands
config.status: executing src commands
have_header: checking for sys/mman.h... -------------------- yes

"gcc -E -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <sys/mman.h>
/* end */

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

have_header: checking for dlfcn.h... -------------------- yes

"gcc -E -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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  conftest.c -o conftest.i"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <dlfcn.h>
/* end */

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

have_library: checking for main() in -ldl... -------------------- no

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static -ldl  -lprocstat -lthr -lcrypt -lm   -lc"
/usr/bin/ld: cannot find -ldl
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 ((*)()))main; return 0; }
/* end */

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static -ldl  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: error: too few arguments to function 'main'
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) { main(); return 0; }
/* end */

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

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

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: error: 'dlopen' undeclared (first use in this function)
conftest.c:13: error: (Each undeclared identifier is reported only once
conftest.c:13: error: 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 ((*)()))dlopen; return 0; }
/* end */

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: warning: implicit declaration of function 'dlopen'
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) { dlopen(); return 0; }
/* end */

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

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

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: error: 'dlclose' undeclared (first use in this function)
conftest.c:13: error: (Each undeclared identifier is reported only once
conftest.c:13: error: 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 ((*)()))dlclose; return 0; }
/* end */

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: warning: implicit declaration of function 'dlclose'
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) { dlclose(); return 0; }
/* end */

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

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

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: error: 'dlsym' undeclared (first use in this function)
conftest.c:13: error: (Each undeclared identifier is reported only once
conftest.c:13: error: 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 ((*)()))dlsym; return 0; }
/* end */

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: warning: implicit declaration of function 'dlsym'
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) { dlsym(); return 0; }
/* end */

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

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

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: error: 'dlerror' undeclared (first use in this function)
conftest.c:13: error: (Each undeclared identifier is reported only once
conftest.c:13: error: 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 ((*)()))dlerror; return 0; }
/* end */

"gcc -o conftest -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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 conftest.c  -L. -L../.. -L. -fstack-protector -rdynamic     -Wl,-R/usr/local/lib -L/usr/local/lib -lruby-static  -lprocstat -lthr -lcrypt -lm   -lc"
conftest.c: In function 't':
conftest.c:13: warning: implicit declaration of function 'dlerror'
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) { dlerror(); return 0; }
/* end */

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

have_const: checking for FFI_STDCALL in ffi.h... -------------------- yes

"gcc -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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   -c conftest.c"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <ffi.h>
4: 
5: /*top*/
6: typedef int conftest_type;
7: conftest_type conftestval = (int)FFI_STDCALL;
/* end */

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

check_signedness: checking signedness of size_t... -------------------- unsigned

"gcc -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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   -c conftest.c"
conftest.c:7: warning: comparison of unsigned expression < 0 is always false
conftest.c:7: error: size of array 'conftest_const' is negative
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <stddef.h>
4: typedef size_t rbcv_typedef_;
5: 
6: /*top*/
7: int conftest_const[((rbcv_typedef_)-1 < 0) ? 1 : -1];
/* end */

"gcc -I../../.ext/include/x86_64-freebsd9.1 -I../.././include -I../.././ext/fiddle -Ilibffi-3.2.1/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   -c conftest.c"
checked program was:
/* begin */
1: #include "ruby.h"
2: 
3: #include <stddef.h>
4: typedef size_t rbcv_typedef_;
5: 
6: /*top*/
7: int conftest_const[((rbcv_typedef_)-1 > 0) ? 1 : -1];
/* end */

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

extconf.h is:
/* begin */
 1: #ifndef EXTCONF_H
 2: #define EXTCONF_H
 3: #define RUBY_LIBFFI_MODVERSION 3002001
 4: #define HAVE_SYS_MMAN_H 1
 5: #define HAVE_DLFCN_H 1
 6: #define HAVE_DLOPEN 1
 7: #define HAVE_DLCLOSE 1
 8: #define HAVE_DLSYM 1
 9: #define HAVE_DLERROR 1
10: #define HAVE_CONST_FFI_STDCALL 1
11: #define SIGNEDNESS_OF_SIZE_T +1
12: #endif
/* end */