ignoreme: error: unknown type name 'choke' choke me ^ ignoreme: error: expected ';' after top level declarator choke me ^ ; 2 errors generated. configure:1918:10: fatal error: 'ac_nonexistent.h' file not found #include ^~~~~~~~~~~~~~~~~~ configure:2009:10: fatal error: 'ac_nonexistent.h' file not found #include ^~~~~~~~~~~~~~~~~~ configure:2156:7: error: implicitly declaring library function 'exit' with type 'void (int) __attribute__((noreturn))' [-Werror,-Wimplicit-function-declaration] exit(2); ^ configure:2156:7: note: include the header or explicitly provide a declaration for 'exit' configure:2259:14: warning: a function definition without a prototype is deprecated in all versions of C and is not supported in C2x [-Wdeprecated-non-prototype] static char *e (p, i) ^ configure:2478:7: error: implicitly declaring library function 'memcmp' with type 'int (const void *, const void *, unsigned long)' [-Werror,-Wimplicit-function-declaration] if (memcmp(&c0, &c2, 1) >= 0 || memcmp(&c1, &c2, 1) >= 0) ^ configure:2478:7: note: include the header or explicitly provide a declaration for 'memcmp' configure:2479:5: error: implicitly declaring library function 'exit' with type 'void (int) __attribute__((noreturn))' [-Werror,-Wimplicit-function-declaration] exit (1); ^ configure:2479:5: note: include the header or explicitly provide a declaration for 'exit' configure:2492:9: error: implicitly declaring library function 'strcpy' with type 'char *(char *, const char *)' [-Werror,-Wimplicit-function-declaration] strcpy (a, "--------01111111"); ^ configure:2492:9: note: include the header or explicitly provide a declaration for 'strcpy' 3 errors generated. configure:2549:6: warning: incompatible redeclaration of library function 'strcspn' [-Wincompatible-library-redeclaration] char strcspn (); ^ configure:2549:6: note: 'strcspn' is a builtin with type 'unsigned long (const char *, const char *)' configure:2549:6: warning: incompatible redeclaration of library function 'strerror' [-Wincompatible-library-redeclaration] char strerror (); ^ configure:2549:6: note: 'strerror' is a builtin with type 'char *(int)' configure:2549:6: warning: incompatible redeclaration of library function 'strspn' [-Wincompatible-library-redeclaration] char strspn (); ^ configure:2549:6: note: 'strspn' is a builtin with type 'unsigned long (const char *, const char *)' configure:2549:6: warning: incompatible redeclaration of library function 'strstr' [-Wincompatible-library-redeclaration] char strstr (); ^ configure:2549:6: note: 'strstr' is a builtin with type 'char *(const char *, const char *)'