[Bug 265521] graphics/png: fix build with clang 15
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Date: Sat, 30 Jul 2022 16:39:39 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265521
Bug ID: 265521
Summary: graphics/png: fix build with clang 15
Product: Ports & Packages
Version: Latest
Hardware: Any
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: Individual Port(s)
Assignee: portmgr@FreeBSD.org
Reporter: dim@FreeBSD.org
Flags: maintainer-feedback?(portmgr@FreeBSD.org)
Assignee: portmgr@FreeBSD.org
During an exp-run for llvm 15 (see bug 265425), it turned out that graphics/png
fails to build with clang 15, with an error:
contrib/libtests/pngvalid.c:11662:4: error: call to undeclared function
'feenableexcept'; ISO C99 and later do not support implicit function
declarations [-Wimplicit-function-declaration]
feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW);
^
This is because clang 15 introduced this new warning, and fenv.h only declares
feenableexcept() when compiling for C standards before C11.
The least disruptive way to solve this is to make the port build with
USE_CSTD=gnu89.
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