LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu x86_64-linux-gnu-pkg-config --exists libffi LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu x86_64-linux-gnu-pkg-config --libs libffi | => "-lffi \n" LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lruby-3.1 -lm -lc" checked program was: /* begin */ 1: #include "ruby.h" 2: 3: int main(int argc, char **argv) 4: { 5: return !!argv[argc]; 6: } /* end */ LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lruby-3.1 -lffi -lm -lc" checked program was: /* begin */ 1: #include "ruby.h" 2: 3: int main(int argc, char **argv) 4: { 5: return !!argv[argc]; 6: } /* end */ LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu x86_64-linux-gnu-pkg-config --cflags-only-I libffi | => "\n" LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu x86_64-linux-gnu-pkg-config --cflags-only-other libffi | => "\n" LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu x86_64-linux-gnu-pkg-config --libs-only-l libffi | => "-lffi \n" package configuration for libffi incflags: cflags: ldflags: libs: -lffi have_library: checking for ffi_prep_closure_loc() in -lffi... -------------------- yes LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lruby-3.1 -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 !!argv[argc]; 15: } 16: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_prep_closure_loc; return !p; } /* end */ -------------------- have_func: checking for ffi_prep_cif_var()... -------------------- yes LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -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 !!argv[argc]; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_prep_cif_var; return !p; } /* end */ LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -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 !!argv[argc]; 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 LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -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 !!argv[argc]; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_raw_call; return !p; } /* end */ LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -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 !!argv[argc]; 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 LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -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 !!argv[argc]; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))ffi_prep_raw_closure; return !p; } /* end */ LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -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 !!argv[argc]; 13: } 14: extern void ffi_prep_raw_closure(); 15: int t(void) { ffi_prep_raw_closure(); return 0; } /* end */ -------------------- have_func: checking for rb_gc_mark_movable()... -------------------- yes LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -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 !!argv[argc]; 13: } 14: int t(void) { void ((*volatile p)()); p = (void ((*)()))rb_gc_mark_movable; return !p; } /* end */ -------------------- block in append_ldflags: checking for whether -pthread is accepted as LDFLAGS... -------------------- yes LD_LIBRARY_PATH=.:/usr/lib/x86_64-linux-gnu "x86_64-linux-gnu-gcc -o conftest -I/usr/include/x86_64-linux-gnu/ruby-3.1.0 -I/usr/include/ruby-3.1.0/ruby/backward -I/usr/include/ruby-3.1.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=BUILDDIR=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC conftest.c -L. -L/usr/lib/x86_64-linux-gnu -L. -Wl,-z,relro -Wl,-z,now -fstack-protector-strong -rdynamic -Wl,-export-dynamic -Wl,--no-as-needed -lffi -lffi -lruby-3.1 -pthread -lm -lc" checked program was: /* begin */ 1: #include "ruby.h" 2: 3: int main(int argc, char **argv) 4: { 5: return !!argv[argc]; 6: } /* end */ -------------------- extconf.h is: /* begin */ 1: #ifndef EXTCONF_H 2: #define EXTCONF_H 3: #define HAVE_FFI_PREP_CIF_VAR 1 4: #define HAVE_FFI_RAW_CALL 1 5: #define HAVE_FFI_PREP_RAW_CLOSURE 1 6: #define HAVE_RAW_API 1 7: #define HAVE_RB_GC_MARK_MOVABLE 1 8: #endif /* end */