Iso C90 Does Not Support Flexible Array Members

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Getting the warning " ISO C90 forbids variable-size array ...

    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.

ISO C forbids qualified void function return type A ...

    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 ...

HiRedis has certain issues when called by another ... - GitHub

    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.

Compiler User Guide: Flexible array members in C99

    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.

Using the GNU Compiler Collection (GCC): Zero Length

    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 …

C90 Compliance · Issue #74 · antirez/sds · GitHub

    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.

DCL38-C. Use the correct syntax when declaring a flexible ...

    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.

Zero size arrays in C Hacker News

    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 ...

C99 - Wikipedia

    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.

48687 – for errors from -pedantic, -Werror reports ...

    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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