warning: implicit declaration of function 與c99
阿新 • • 發佈：2019-01-03
-U__STRICT_ANSI_
-std=c99 或者 -std=iso9899:1999 使用C99規範。
-std=gnu89 使用c89規範加上gcc自己的擴充套件（目前預設）
-std=gnu99 使用c99規範加上gcc自己的擴充套件
編譯時更改規範為c99擴充套件 -std=gnu99 可以解決問題
相關 stdlib.h -std=c99 define _STRICT_ANSI_
解決
https://sourceware.org/ml/newlib/2012/txt00018.txt
http://www.nntp.perl.org/group/perl.perl5.porters/2007/02/msg120546.html
toke.c:544: warning: implicit declaration of function `strlcpy' toke.c:6178: warning: implicit declaration of function `snprintf' regcomp.c:9127: warning: implicit declaration of function `snprintf' dump.c:233: warning: implicit declaration of function `snprintf' util.c:1650: warning: implicit declaration of function `unsetenv' util.c:1652: warning: implicit declaration of function `setenv' util.c:3166: warning: implicit declaration of function `strlcpy' util.c:4353: warning: implicit declaration of function `snprintf' util.c:5110: warning: implicit declaration of function `strtoull' util.c:5117: warning: implicit declaration of function `srand48' util.c:5118: warning: implicit declaration of function `drand48' util.c:5441: warning: implicit declaration of function `vsnprintf' mg.c:744: warning: implicit declaration of function `strerror_r' mg.c:2514: warning: implicit declaration of function `atoll' perl.c:3722: warning: implicit declaration of function `strerror_r' pp_hot.c:1530: warning: implicit declaration of function `strerror_r' sv.c:2574: warning: implicit declaration of function `snprintf' pp.c:2840: warning: implicit declaration of function `srand48' pp.c:2843: warning: implicit declaration of function `drand48' pp_ctl.c:850: warning: implicit declaration of function `snprintf' pp_ctl.c:3334: warning: implicit declaration of function `strerror_r' pp_ctl.c:3511: warning: implicit declaration of function `strlcpy' doio.c:262: warning: implicit declaration of function `strlcat' doio.c:831: warning: implicit declaration of function `strerror_r' doio.c:1461: warning: implicit declaration of function `strlcpy' universal.c:694: warning: implicit declaration of function `snprintf' perlio.c:177: warning: implicit declaration of function `fileno' perlio.c:499: warning: implicit declaration of function `snprintf' perlio.c:500: warning: implicit declaration of function `vsnprintf' perlio.c:2827: warning: implicit declaration of function `fdopen' perlio.c:3259: warning: implicit declaration of function `fseeko' perlio.c:3268: warning: implicit declaration of function `ftello' perlio.c:3330: warning: implicit declaration of function `setlinebuf' perlio.c:5083: warning: implicit declaration of function `mkstemp' pp_sort.c:787: warning: implicit declaration of function `drand48' cygwin.c:34: warning: implicit declaration of function `strerror_r'