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# (c) https://github.com/dev-cafe/autocmake/blob/master/AUTHORS.md
# licensed under BSD-3: https://github.com/dev-cafe/autocmake/blob/master/LICENSE
#.rst:
#
# Adds C support.
# Appends EXTRA_CFLAGS to CMAKE_C_FLAGS.
# If environment variable CFLAGS is set, then the CFLAGS are used
# and no other flags are used or appended.
#
# Variables used::
#
# EXTRA_CFLAGS
#
# Variables modified::
#
# CMAKE_C_FLAGS
#
# Environment variables used::
#
# CFLAGS
#
# autocmake.yml configuration::
#
# docopt:
# - "--cc=<CC> C compiler [default: gcc]."
# - "--extra-cc-flags=<EXTRA_CFLAGS> Extra C compiler flags [default: '']."
# define: "'-DCMAKE_C_COMPILER={0} -DEXTRA_CFLAGS=\"{1}\"'.format(arguments['--cc'], arguments['--extra-cc-flags'])"
if(NOT DEFINED CMAKE_C_COMPILER_ID)
message(FATAL_ERROR "CMAKE_C_COMPILER_ID variable is not defined!")
endif()
if(NOT CMAKE_C_COMPILER_WORKS)
message(FATAL_ERROR "CMAKE_C_COMPILER_WORKS is false!")
endif()
if(DEFINED EXTRA_CFLAGS)
if(NOT EXTRA_CFLAGS STREQUAL "")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_CFLAGS}")
endif()
endif()
if(DEFINED ENV{CFLAGS})
message(STATUS "CFLAGS is set to '$ENV{CFLAGS}'.")
set(CMAKE_C_FLAGS "$ENV{CFLAGS}")
endif()
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