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posix: manually define _POSIX_C_SOURCE in lib/posix

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This PR adds declarations for the application conformance
feature test macro _POSIX_C_SOURCE.

It needs to be defined to value greater than or equal to 200112L
by the appplication.

However, Zephyr currently does not have a simple and consistent
means of specifying this value for POSIX samples, tests,
applications, and other libraries.

Signed-off-by: Christopher Friedt <cfriedt@meta.com>
This commit is contained in:
Christopher Friedt 2024-02-03 18:49:45 -05:00 committed by Chris Friedt
parent 447fc24352
commit 529023e6f8
1 changed files with 6 additions and 0 deletions
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6
lib/posix/shell/CMakeLists.txt
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@ -1,6 +1,12 @@
# Copyright (c) 2024 Meta
# SPDX-License-Identifier: Apache-2.0
zephyr_library()
# For setenv() and unsetenv()
zephyr_library_compile_options(-U_POSIX_C_SOURCE -D_POSIX_C_SOURCE=200809L)
# For getenv_r() visibility
zephyr_library_compile_definitions(_BSD_SOURCE)
zephyr_library_sources_ifdef(CONFIG_POSIX_SHELL posix_shell.c)
zephyr_library_sources_ifdef(CONFIG_POSIX_UNAME_SHELL uname.c)
zephyr_library_sources_ifdef(CONFIG_POSIX_ENV_SHELL env.c)