[MacPorts] #64420: argyll @2.2.1_1: error: implicit declaration of function 'execvp' is invalid in C99 (was: argyll @2.2.1_1 fails to compile on macOS 12.1)

[MacPorts]

#64420: argyll @2.2.1_1: error: implicit declaration of function 'execvp' is
invalid in C99
--------------------------+--------------------------------------
  Reporter:  dwightkelly  |      Owner:  lbschenkel
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.7.1
Resolution:               |   Keywords:  catalina bigsur monterey
      Port:  argyll       |
--------------------------+--------------------------------------
Changes (by ryandesign):

 * status:  new => assigned
 * keywords:   => catalina bigsur monterey
 * owner:  (none) => lbschenkel
 * port:  argyll @2.2.1_1 => argyll


Old description:

> The error below occur while installing argyll @2.2.1_1 on macOS 12.1
> Apple clang version 13.0.0 (clang-1300.0.27.3)
> Target: x86_64-apple-darwin21.2.0
> Thread model: posix
>
> {{{
> :info:build execunix.c:234:6: error: implicit declaration of function
> 'execvp' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
> :info:build             execvp( argv[0], argv );
> :info:build             ^
> :info:build execunix.c:235:6: error: implicitly declaring library
> function '_exit' with type 'void (int) __attribute__((noreturn))'
> [-Werror,-Wimplicit-function-declaration]
> :info:build             _exit(127);
> :info:build             ^
> :info:build execunix.c:235:6: note: include the header <unistd.h> or
> explicitly provide a declaration for '_exit'
> }}}

New description:

 The error below occur while installing argyll @2.2.1_1 on macOS 12.1
 {{{
 Apple clang version 13.0.0 (clang-1300.0.27.3)
 Target: x86_64-apple-darwin21.2.0
 Thread model: posix
 }}}

 {{{
 :info:build execunix.c:234:6: error: implicit declaration of function
 'execvp' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
 :info:build             execvp( argv[0], argv );
 :info:build             ^
 :info:build execunix.c:235:6: error: implicitly declaring library function
 '_exit' with type 'void (int) __attribute__((noreturn))' [-Werror
 ,-Wimplicit-function-declaration]
 :info:build             _exit(127);
 :info:build             ^
 :info:build execunix.c:235:6: note: include the header <unistd.h> or
 explicitly provide a declaration for '_exit'
 }}}

--

Comment:

 Probably fails the same way on any system with Xcode 12+.

-- 
Ticket URL: <https://trac.macports.org/ticket/64420#comment:1>
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