PAC_C_RESTRICT
Check if C supports restrict
Synopsis
PAC_C_RESTRICT
Output Effect
Defines restrict if some version of restrict is supported; otherwise
defines restrict as empty. This allows you to include restrict in
declarations in the same way that AC_C_CONST allows you to use const
in declarations even when the C compiler does not support const
Note that some compilers accept restrict only with additional options.
DEC/Compaq/HP Alpha Unix (Tru64 etc.) -accept restrict_keyword