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https://stackoverflow.com/questions/4775172/getting-the-warning-iso-c90-forbids-variable-size-array-in-gcc-compiler-while
You get that warning because C90 does not support variable length arrays.. You'll either have to switch gcc to C99 mode (which does support vla) , by using the -std=c99 or std=gnu99 command line flag, or rewrite your code to dynamically allocate memory or use a fixed size array.
https://www.coursehero.com/file/p14f6i4/ISO-C-forbids-qualified-void-function-return-type-A-qualifier-may-not-be-used/
ISO C90 does not support flexible array members A flexible array member is a new feature in C99. ISO C90 does not support it. ISO C90 does not support ‘long long’ The long long type is not supported in ISO C90. ISO C90 does not support ‘static’ or type qualifiers in parameter array declarators When using an array as a parameter to a ...
https://github.com/redis/hiredis/issues/494
Dec 16, 2016 · ./sds.h: 48: 10: error: ISO C90 does not support flexible array members [-Werror=pedantic] char buf[]; The string library is defining a zero length member at the end of the struct. The only way to do this in C90 (afaik) is to define it like char buf[1] then do +1 -1 math on allocation/reallocation/etc.
http://www.keil.com/support/man/docs/armcc/armcc_chr1359124238837.htm
Non-Confidential PDF versionARM DUI0375H ARM® Compiler v5.06 for µVision® armcc User GuideVersion 5Home > Compiler Coding Practices > Flexible array members in C99 4.65 Flexible array members in C99 In a struct with more than one member, the last member of the struct can have incomplete array type. Such a member is called a flexible array member of the struct.
https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
The preferred mechanism to declare variable-length types like struct line above is the ISO C99 flexible array member, with slightly different syntax and semantics: Flexible array members are written as contents[] without the 0. Flexible array members have incomplete type, and so the sizeof operator may not …
https://github.com/antirez/sds/issues/74
Dec 16, 2016 · sds.h:48:10: warning: ISO C90 does not support flexible array members [-Wpedantic] ... sds.c:640:52: warning: ISO C90 does not support ‘long long’ [-Wlong-long] Is there any chance that sds (being a low level library) can be changed to become C90 compliant? Related Issue: redis/hiredis#494. This comment has been minimized. Sign in to view.
https://wiki.sei.cmu.edu/confluence/display/c/DCL38-C.+Use+the+correct+syntax+when+declaring+a+flexible+array+member
Aug 30, 2019 · I don't see it for the CS, or if it does, then EXP03-C is wrong. Flexible array members do not contribute to the size of the structure (that's why you cannot have a structure with only one member which is a flexible array – you'd have a zero-sized struct then), so you're not assuming anything about the size of the structure based on calculating the flexible array member size needs.
https://news.ycombinator.com/item?id=11674374
A zero sized array declaration was a constraint violation (this requiring a diagnostic) in ISO C 90 in all contexts: even as a function parameter, where the identifier being declared is actually a pointer and not an array at all! C99 added the "flexible array member" feature: the last element of a struct can be an array of size zero: "As a ...
https://en.wikipedia.org/wiki/C99
C99 (previously known as C9X) is an informal name for ISO/IEC 9899:1999, a past version of the C programming language standard. It extends the previous version with new features for the language and the standard library, and helps implementations make better use of available computer hardware, such as IEEE 754-1985 floating-point arithmetic, and compiler technology.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48687
GCC Bugzilla – Bug 48687 for errors from -pedantic, -Werror reports "[-Werror=edantic]" Last modified: 2011-04-19 15:17:39 UTC
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