SyntaxCheckCompilerFlag

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• .check_compile_flag
  • Adding a Compiler Flag
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.check_compile_flag

Checks to see if a compiler flag is valid, and if so, adds it to CFLAGS for the current profile.

.check_compile_flag '-Wmissing-prototypes';
.check_compile_flag '-Wno-missing-prototypes' { .negate; }

Because gcc will not create a warning or error when a compiler flag is prefixed with '-Wno-', it is necessary to check the compiler flag without the '-Wno-' prefix. To do this, append a statement block to the check, and add the .negate attribute.

But be aware that some warning flags such as '-Wno-poison-system-directories' for MacOS/clang do not have an opposite and cannot be tested with the .negate attribute.

Generated Name: Prefix: cf_
The leading '-' or '-W' is removed from the name.
Example: cf_missing_prototypes

Adding a Compiler Flag

.add_compile_flag '-DNO_DEPRECATED';

Adds a compiler flag without any validation.

Examples

.check_compile_flag '-Wall';
.check_compile_flag '-Wformat';

Attributes

• .header
• .name
• .negate
• .compiler_flags

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