0002815: implicit declaration of function 'strcasestr' is invalid in C99

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Date Submitted

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0002815

Buildsystem

[All Projects] General

public

2021-04-14 17:29

2024-01-02 04:31

Reporter

Ryan Carsten Schmidt

Assigned To

Priority

normal

Severity

minor

Reproducibility

always

Status

new

Resolution

open

Platform

x86_64

macOS

OS Version

10.13.6

Summary

0002815: implicit declaration of function 'strcasestr' is invalid in C99

Description

Trying to build NetSurf 3.10 on macOS 10.13.6 (with -Werror=implicit-function-declaration in CFLAGS, in order to simulate what happens by default with newer versions of Xcode clang) with the gtk3 target failed as follows:

content/handlers/html/css.c:229:7: error: implicit declaration of function 'strcasestr' is invalid in C99 [-Werror,-Wimplicit-function-declaration]

In /usr/include/string.h, strcasestr is declared within a conditional:

/* Darwin extensions */

#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
...
char *strcasestr(const char *__big, const char *__little);

I worked around the problem by adding -D_DARWIN_C_SOURCE to CFLAGS, similar to the way that you already use -D_BSD_SOURCE, -D_DEFAULT_SOURCE, and -D_NETBSD_SOURCE in frontends/gtk/Makefile.

Steps To Reproduce

Build NetSurf 3.10 on any version of macOS with -Werror=implicit-function-declaration in CFLAGS.

Date Modified	Username	Field
Issue History
2021-04-14 17:29	Ryan Carsten Schmidt	New Issue
2024-01-02 04:31	Ryan Carsten Schmidt	Note Added: 0002429

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