7.157 --strict_warnings

Diagnostics that are errors in --strict mode are downgraded to warnings, where possible.

It is sometimes not possible for the compiler to downgrade a strict error, for example, where it cannot construct a legitimate program to recover.


When --strict_warnings is in force and a violation of the relevant ISO standard occurs, the compiler normally issues a warning message.
The severity of diagnostic messages can be controlled using the --diag_error, --diag_remark, and --diag_warning options.


In some cases, the compiler issues an error message instead of a warning when it detects something that is strictly illegal, and terminates the compilation. For example:
#ifdef $Super$
extern void $Super$$__aeabi_idiv0(void); /* intercept __aeabi_idiv0 */
Compiling this code with --strict_warnings generates an error if you do not use the --dollar option.


void foo(void)
    long long i; /* okay in nonstrict C90 */
Compiling this code with --strict_warnings generates a warning message.
Compilation continues, even though the expression long long is strictly illegal.
Related reference
7.5 --anachronisms, --no_anachronisms
7.44 --diag_error=tag[,tag,...]
7.45 --diag_remark=tag[,tag,...]
7.49 --diag_warning=tag[,tag,...]
7.157 --strict_warnings
8.19 Dollar signs in identifiers
1.2 Source language modes of the compiler
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