i#7493 GCC-15: Specify language dialect when checking type existence #7494
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Existence of types may vary between language versions. For example, bool is turned into a builtin type in C23, but is defined in stdbool.h only in pre-C23 specifications. Let's specify the C dialet used by our main codebase, GNU C99, explicitly when checking for existence of types, to keep probed results aligned with configuration used for building. Issue: DynamoRIO#7493
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| if (UNIX) # unlikely to be an issue on Windows | ||
| # Check for uint, etc. typedef conflicts like on rhel3 (i#18) | ||
| # and set DR_DO_NOT_DEFINE_* |
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Let's specify the C dialet used by our main codebase, GNU C99, explicitly when checking for existence of types, to keep
spelling: dialect
| # Note that for later gcc uint and ushort seem to be "soft typedefs": | ||
| # defined, but overridable: ?!? | ||
| set(CMAKE_ORIG_C_FLAGS "${CMAKE_C_FLAGS}") | ||
| set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99") |
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If the issue is that gnu99 is not passed everywhere, shouldn't we solve that? Adding this temporary gnu99 just for these checks does not seem the best approach. There is also no comment here explaining why we'd set a flag and then unset it so this going to be confusing to future readers without explanation.
ziyao233
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Existence of types may vary between language versions. For example, bool is turned into a builtin type in C23, but is defined in stdbool.h only in pre-C23 specifications.
Let's specify the C dialect used by our main codebase, GNU C99, explicitly when checking for existence of types, to keep probed results aligned with configuration used for building.
Issue: #7493