FreeBSD Manual Pages
MKC_CHECK_DECL(1) MKC_CHECK_DECL(1) NAME mkc_check_decl - checks for define, variable, function, type, member or function prototype. SYNOPSIS mkc_check_decl [OPTIONS] <check_type> <what> [headers...] DESCRIPTION check_type is either define, variable, func[0-9], funcordefine[0-9], type, member or prototype. Depending on its value mkc_check_decl checks respec- tively for define, variable, function with the specified number of argu- ments (or equivalent define in case of funcordefine[0-9]), data type, mem- ber of structure or a function prototype in the specified headers by com- piling a test program. headers is either a single header file or a list of headers, separated by comma. As a result mkc_check_decl prints either 1 (success) or 0 (failure) to stdout. By default, temporary and cache files _mkc_<check_type>_<what>_<lheader_h>.{c,err,res} are created under MKC_CACHEDIR directory. Here, lheader_h is the last header from comma-sepa- rated list headers. OPTIONS -h Display help message. -d Delete cache and temporary files. -D Delete cache files. ENVIRONMENT CC Compiler. By default cc is used. CPPFLAGS, CFLAGS Options passed to the compiler, for example -I for additional direc- tories that contain header files. MKC_VERBOSE If set to 1, verbose messages are output to stderr. MKC_SHOW_CACHED If set to 1 and MKC_VERBOSE is set to 1, cached results are output to stderr. MKC_COMMON_HEADERS List of header files to add to .c test program. MKC_CACHEDIR Directory where temporary and cache files are created. If unset they are created in a current directory. MKC_NOCACHE All results are cached unless MKC_NOCACHE variable is set to 1. MKC_DELETE_TMPFILES If set to 1, temporary files are removed. EXAMPLES mkc_check_decl define __GNUC__ mkc_check_decl define RTLD_LAZY dlfcn.h mkc_check_decl define FTS_W sys/types.h,sys/stat.h,fts.h mkc_check_decl variable sys_errlist errno.h mkc_check_decl variable __malloc_hook malloc.h mkc_check_decl func3 poll poll.h mkc_check_decl func2 fgetln stdio.h mkc_check_decl type mbstate_t wchar.h mkc_check_decl type long-long mkc_check_decl member tm.tm_isdst time.h mkc_check_decl member ifreq.ifr_addr.sa_len net/if.h mkc_check_decl member struct-stat.st_mtimespec sys/stat.h mkc_check_decl prototype 'int connect(int,const struct sockaddr*,socklen_t)' sys/socket.h mkc_check_decl prototype 'int connect(int,struct sockaddr*,socklen_t)' sys/socket.h C FILE CONTENT define #include <header1.h> ... #include <headerN.h> #if defined(WHAT) int func(void) { return 0; } #else #error "WHAT is not a define" #endif variable #include <header1.h> ... #include <headerN.h> int func(void) { return sizeof ((WHAT)) && (&WHAT != 0); } func3 (example for function with 3 arguments) #include <header1.h> ... #include <headerN.h> void func (void) { if (WHAT) return; WHAT(0,0,0); } funcordefine3 (example for function/define with 3 arguments) #include <header1.h> ... #include <headerN.h> void func (void) { WHAT(0,0,0); } type #include <header1.h> ... #include <headerN.h> int func(void) { return sizeof (WHAT); } member (example for struct stat.st_mtimespec) #include <sys/stat.h> int func(void) { struct_stat var; return sizeof (var.st_mtimespec); } prototype (example for void ttt(int,char**) function) #include <header1.h> ... #include <headerN.h> void func (void); void func2 (void); void func (void) { if (ttt) return; } void ttt(int, char**); void func2 (void) { if (ttt) return; } AUTHOR Aleksey Cheusov <vle@gmx.net> Dec 2, 2023 MKC_CHECK_DECL(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | ENVIRONMENT | EXAMPLES | C FILE CONTENT | AUTHOR
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