"pkg-config --exists libffi" | pkg-config --libs libffi => "-L/usr/lib/../lib -lffi \n" "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -lruby -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/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -lruby -L/usr/lib/../lib -lffi -lm -lc" checked program was: /* begin */ 1: #include "ruby.h" 2: 3: int main(int argc, char **argv) 4: { 5: return 0; 6: } /* end */ | pkg-config --cflags-only-I libffi => "-I/usr/lib/libffi-3.2.1/include \n" | pkg-config --cflags-only-other libffi => "\n" | pkg-config --libs-only-l libffi => "-lffi \n" package configuration for libffi cflags: ldflags: -L/usr/lib/../lib libs: -lffi have_library: checking for ffi_call() in -lffi... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lruby -lffi -lffi -lm -lc" checked program was: /* begin */ 1: #include "ruby.h" 2: 3: #include 4: 5: /*top*/ 6: extern int t(void); 7: int main(int argc, char **argv) 8: { 9: if (argc > 1000000) { 10: int (* volatile tp)(void)=(int (*)(void))&t; 11: printf("%d", (*tp)()); 12: } 13: 14: return 0; 15: } 16: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_call; return !p; } /* end */ -------------------- have_func: checking for ffi_closure_alloc()... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -lm -lc" conftest.c: In function ‘t’: conftest.c:14:57: error: ‘ffi_closure_alloc’ undeclared (first use in this function) 14 | int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_closure_alloc; return !p; } | ^~~~~~~~~~~~~~~~~ conftest.c:14:57: 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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_closure_alloc; return !p; } /* end */ "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: extern void ffi_closure_alloc(); 15: int t(void) { ffi_closure_alloc(); return 0; } /* end */ -------------------- have_header: checking for shlwapi.h... -------------------- no "gcc -E -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -o conftest.i" conftest.c:3:10: fatal error: shlwapi.h: No such file or directory 3 | #include | ^~~~~~~~~~~ compilation terminated. checked program was: /* begin */ 1: #include "ruby.h" 2: 3: #include /* end */ -------------------- have_func: checking for rb_thread_call_without_gvl()... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -lm -lc" conftest.c: In function ‘t’: conftest.c:14:57: error: ‘rb_thread_call_without_gvl’ undeclared (first use in this function) 14 | int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_thread_call_without_gvl; return !p; } | ^~~~~~~~~~~~~~~~~~~~~~~~~~ conftest.c:14:57: 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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_thread_call_without_gvl; return !p; } /* end */ "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: extern void rb_thread_call_without_gvl(); 15: int t(void) { rb_thread_call_without_gvl(); return 0; } /* end */ -------------------- have_func: checking for ruby_native_thread_p()... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ruby_native_thread_p; return !p; } /* end */ -------------------- have_func: checking for ruby_thread_has_gvl_p()... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -lm -lc" conftest.c: In function ‘t’: conftest.c:14:57: error: ‘ruby_thread_has_gvl_p’ undeclared (first use in this function) 14 | int t(void) { void ((*volatile p)()); p = (void ((*)()))ruby_thread_has_gvl_p; return !p; } | ^~~~~~~~~~~~~~~~~~~~~ conftest.c:14:57: 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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ruby_thread_has_gvl_p; return !p; } /* end */ "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: extern void ruby_thread_has_gvl_p(); 15: int t(void) { ruby_thread_has_gvl_p(); return 0; } /* end */ -------------------- have_func: checking for ffi_prep_cif_var()... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -lm -lc" conftest.c: In function ‘t’: conftest.c:14:57: error: ‘ffi_prep_cif_var’ undeclared (first use in this function) 14 | int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_prep_cif_var; return !p; } | ^~~~~~~~~~~~~~~~ conftest.c:14:57: 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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_prep_cif_var; return !p; } /* end */ "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: extern void ffi_prep_cif_var(); 15: int t(void) { ffi_prep_cif_var(); return 0; } /* end */ -------------------- have_func: checking for ffi_raw_call()... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -lm -lc" conftest.c: In function ‘t’: conftest.c:14:57: error: ‘ffi_raw_call’ undeclared (first use in this function) 14 | int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_raw_call; return !p; } | ^~~~~~~~~~~~ conftest.c:14:57: 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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_raw_call; return !p; } /* end */ "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: extern void ffi_raw_call(); 15: int t(void) { ffi_raw_call(); return 0; } /* end */ -------------------- have_func: checking for ffi_prep_raw_closure()... -------------------- yes "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -lm -lc" conftest.c: In function ‘t’: conftest.c:14:57: error: ‘ffi_prep_raw_closure’ undeclared (first use in this function) 14 | int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_prep_raw_closure; return !p; } | ^~~~~~~~~~~~~~~~~~~~ conftest.c:14:57: 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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_prep_raw_closure; return !p; } /* end */ "gcc -o conftest -I/usr/include/ruby-2.6.0/x86_64-linux -I/usr/include/ruby-2.6.0/ruby/backward -I/usr/include/ruby-2.6.0 -I. -I/usr/lib/libffi-3.2.1/include -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -fPIC conftest.c -L. -L/usr/lib -L. -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -L/usr/lib/../lib -lffi -lffi -lruby -lffi -lffi -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: int (* volatile tp)(void)=(int (*)(void))&t; 9: printf("%d", (*tp)()); 10: } 11: 12: return 0; 13: } 14: extern void ffi_prep_raw_closure(); 15: int t(void) { ffi_prep_raw_closure(); return 0; } /* end */ -------------------- extconf.h is: /* begin */ 1: #ifndef EXTCONF_H 2: #define EXTCONF_H 3: #define HAVE_FFI_CLOSURE_ALLOC 1 4: #define HAVE_RB_THREAD_CALL_WITHOUT_GVL 1 5: #define HAVE_RUBY_NATIVE_THREAD_P 1 6: #define HAVE_RUBY_THREAD_HAS_GVL_P 1 7: #define HAVE_FFI_PREP_CIF_VAR 1 8: #define HAVE_FFI_RAW_CALL 1 9: #define HAVE_FFI_PREP_RAW_CLOSURE 1 10: #define HAVE_RAW_API 1 11: #define RUBY_1_9 1 12: #endif /* end */