IAR ARM compilation errors

[sevstels]

disgusting code style...

Error[Pe144]: a value of type "void const *" cannot be used to initialize an entity of type "uint8_t const lfs_util.c 22

Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 30
Error[Pe513]: a value of type "void *" cannot be assigned to an entity of type "uint32_t *" \bd\lfs_testbd.c 39
Error[Pe513]: a value of type "void *" cannot be assigned to an entity of type "uint32_t *" \bd\lfs_testbd.c 41
Error[Pe029]: expected an expression \bd\lfs_testbd.c 53
Error[Pe029]: expected an expression \bd\lfs_testbd.c 60
Warning[Pe012]: parsing restarts here after previous syntax error \bd\lfs_testbd.c 63
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 89
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 108
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 118
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 128
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 137
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 151
Error[Pe020]: identifier "assert" is undefined \bd\lfs_testbd.c 154
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 176
Error[Pe020]: identifier "assert" is undefined \bd\lfs_testbd.c 179
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 222
Error[Pe020]: identifier "assert" is undefined \bd\lfs_testbd.c 225
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 279
Error[Pe020]: identifier "assert" is undefined \bd\lfs_testbd.c 282
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_testbd *" \bd\lfs_testbd.c 292
Error[Pe020]: identifier "assert" is undefined \bd\lfs_testbd.c 295
Error while running C/C++ Compiler
lfs_filebd.c
Warning[Pa050]: non-native end of line sequence detected (this diagnostic is only issued once) \bd\lfs_filebd.h 1
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_filebd *" \bd\lfs_filebd.c 26
Error[Pe020]: identifier "O_RDWR" is undefined \bd\lfs_filebd.c 30
Error[Pe020]: identifier "O_CREAT" is undefined \bd\lfs_filebd.c 30
Error[Pe020]: identifier "open" is undefined \bd\lfs_filebd.c 30
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_filebd *" \bd\lfs_filebd.c 60
Error[Pe020]: identifier "close" is undefined \bd\lfs_filebd.c 61
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_filebd *" \bd\lfs_filebd.c 76
Error[Pe020]: identifier "assert" is undefined \bd\lfs_filebd.c 79
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 89
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 90
Error[Pe018]: expected a ")" \bd\lfs_filebd.c 90
Error[Pe020]: identifier "lseek" is undefined \bd\lfs_filebd.c 89
Error[Pe040]: expected an identifier \bd\lfs_filebd.c 90
Error[Pe020]: identifier "ssize_t" is undefined \bd\lfs_filebd.c 97
Error[Pe020]: identifier "read" is undefined \bd\lfs_filebd.c 97
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_filebd *" \bd\lfs_filebd.c 112
Error[Pe020]: identifier "assert" is undefined \bd\lfs_filebd.c 115
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 121
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 122
Error[Pe018]: expected a ")" \bd\lfs_filebd.c 122
Error[Pe020]: identifier "lseek" is undefined \bd\lfs_filebd.c 121
Error[Pe040]: expected an identifier \bd\lfs_filebd.c 122
Error[Pe020]: identifier "ssize_t" is undefined \bd\lfs_filebd.c 131
Error[Pe020]: identifier "read" is undefined \bd\lfs_filebd.c 131
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 143
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 144
Error[Pe018]: expected a ")" \bd\lfs_filebd.c 144
Error[Pe020]: identifier "lseek" is undefined \bd\lfs_filebd.c 143
Error[Pe040]: expected an identifier \bd\lfs_filebd.c 144
Error[Pe020]: identifier "ssize_t" is undefined \bd\lfs_filebd.c 151
Error[Pe020]: identifier "write" is undefined \bd\lfs_filebd.c 151
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_filebd *" \bd\lfs_filebd.c 164
Error[Pe020]: identifier "assert" is undefined \bd\lfs_filebd.c 167
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 171
Error[Pe020]: identifier "off_t" is undefined \bd\lfs_filebd.c 171
Error[Pe018]: expected a ")" \bd\lfs_filebd.c 171
Error[Pe020]: identifier "lseek" is undefined \bd\lfs_filebd.c 171
Error[Pe040]: expected an identifier \bd\lfs_filebd.c 171
Error[Pe020]: identifier "ssize_t" is undefined \bd\lfs_filebd.c 179
Error[Pe029]: expected an expression \bd\lfs_filebd.c 179
Error[Pe020]: identifier "write" is undefined \bd\lfs_filebd.c 179
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_filebd *" \bd\lfs_filebd.c 195
Error[Pe020]: identifier "fsync" is undefined \bd\lfs_filebd.c 196
Error while running C/C++ Compiler
lfs.c
Warning[Pa050]: non-native end of line sequence detected (this diagnostic is only issued once) \lfs.c 1
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "uint8_t *" \lfs.c 31
Error[Pe020]: identifier "assert" is undefined \lfs.c 90
Error[Pe144]: a value of type "void const *" cannot be used to initialize an entity of type "uint8_t const *" \lfs.c 120
Error[Pe020]: identifier "assert" is undefined \lfs.c 142
Error[Pe020]: identifier "assert" is undefined \lfs.c 182
Error[Pe144]: a value of type "void const *" cannot be used to initialize an entity of type "uint8_t const *" \lfs.c 190
Error[Pe020]: identifier "assert" is undefined \lfs.c 191
Error[Pe020]: identifier "assert" is undefined \lfs.c 233
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 387
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 387
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 388
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 388
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 392
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 392
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 393
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 393
Warning[Pe224]: the format string requires additional arguments \lfs.c 495
Error[Pe018]: expected a ")" \lfs.c 494
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "uint8_t *" \lfs.c 588
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "uint32_t *" \lfs.c 647
Error[Pe167]: argument of type "void const *" is incompatible with parameter of type "lfs_mdir const *" \lfs.c 741
Error[Pe144]: a value of type "void const *" cannot be used to initialize an entity of type "lfs_attr const *" \lfs.c 751
Error[Pe029]: expected an expression \lfs.c 940
Warning[Pe224]: the format string requires additional arguments \lfs.c 998
Error[Pe018]: expected a ")" \lfs.c 997
Error[Pe070]: incomplete type is not allowed \lfs.c 1045
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_dir_find_match *" \lfs.c 1070
Error[Pe144]: a value of type "void const *" cannot be used to initialize an entity of type "lfs_diskoff const *" \lfs.c 1072
Error[Pe029]: expected an expression \lfs.c 1172
Error[Pe144]: a value of type "void const *" cannot be used to initialize an entity of type "lfs_diskoff const *" \lfs.c 1241
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1403
Error[Pe029]: expected an expression \lfs.c 1403
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1403
Error[Pe029]: expected an expression \lfs.c 1403
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "uint32_t *" \lfs.c 1447
Error[Pe144]: a value of type "void *" cannot be used to initialize an entity of type "lfs_dir_commit_commit *" \lfs.c 1460
Error[Pe119]: cast to type "unsigned int const [2]" is not allowed \lfs.c 1525
Error[Pe029]: expected an expression \lfs.c 1525
Warning[Pe224]: the format string requires additional arguments \lfs.c 1536
Error[Pe018]: expected a ")" \lfs.c 1536
Error[Pe029]: expected an expression \lfs.c 1606
Error[Pe020]: identifier "assert" is undefined \lfs.c 1667
Error[Pe029]: expected an expression \lfs.c 1673
Warning[Pe224]: the format string requires additional arguments \lfs.c 1685
Error[Pe018]: expected a ")" \lfs.c 1685
Error[Pe119]: cast to type "unsigned int const [2]" is not allowed \lfs.c 1689
Error[Pe029]: expected an expression \lfs.c 1689
Warning[Pe224]: the format string requires additional arguments \lfs.c 1691
Error[Pe018]: expected a ")" \lfs.c 1690
Warning[Pe224]: the format string requires additional arguments \lfs.c 1709
Error[Pe018]: expected a ")" \lfs.c 1707
Error[Pe020]: identifier "assert" is undefined \lfs.c 1746
Error[Pe029]: expected an expression \lfs.c 1792
Error[Pe020]: identifier "assert" is undefined \lfs.c 1840
Error[Pe029]: expected an expression \lfs.c 1845
Error[Pe144]: a value of type "lfs::lfs_mlist *" cannot be used to initialize an entity of type "lfs_mlist *" \lfs.c 1866
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1866
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1867
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1867
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1868
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1871
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1872
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1873
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1875
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1876
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1877
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1881
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1882
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1883
Error[Pe144]: a value of type "lfs::lfs_mlist *" cannot be used to initialize an entity of type "lfs_mlist *" \lfs.c 1891
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1891
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1892
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1893
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1893
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1893
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1895
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1895
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1896
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 1896
Error[Pe070]: incomplete type is not allowed \lfs.c 1918
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1955
Error[Pe029]: expected an expression \lfs.c 1955
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1955
Error[Pe029]: expected an expression \lfs.c 1955
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1977
Error[Pe029]: expected an expression \lfs.c 1977
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1977
Error[Pe029]: expected an expression \lfs.c 1977
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1992
Error[Pe029]: expected an expression \lfs.c 1992
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 1992
Error[Pe029]: expected an expression \lfs.c 1992
Error[Pe513]: a value of type "lfs_mlist *" cannot be assigned to an entity of type "lfs::lfs_mlist *" \lfs.c 2053
Error[Pe144]: a value of type "lfs::lfs_mlist **" cannot be used to initialize an entity of type "lfs_mlist **" \lfs.c 2062
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 2062
Error[Pe393]: pointer to incomplete class type is not allowed \lfs.c 2064
Error[Pe029]: expected an expression \lfs.c 2216
Warning[Pe224]: the format string requires additional arguments \lfs.c 2331
Error[Pe018]: expected a ")" \lfs.c 2331
Error[Pe029]: expected an expression \lfs.c 2346
Error[Pe513]: a value of type "lfs_mlist *" cannot be assigned to an entity of type "lfs::lfs_mlist *" \lfs.c 2418
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 2434
Error[Pe029]: expected an expression \lfs.c 2434
Error[Pe2363]: cast to incomplete array type "lfs_mattr []" is not allowed \lfs.c 2434
Error[Pe029]: expected an expression \lfs.c 2434
Error[Pe167]: argument of type "lfs_file::lfs_ctz *" is incompatible with parameter of type "lfs_ctz *" \lfs.c 2462
Error[Pe513]: a value of type "void *" cannot be assigned to an entity of type "uint8_t *" \lfs.c 2491
Error limit reached
Error while running C/C++ Compiler

[geky]

I'm not really sure how to respond to this. Looking through a few of the warnings and the existing code is perfectly valid c99 code.

Are you sure you have IAR configured to compile in c99 mode?
https://www.iar.com/support/resources/articles/exploring-c11-and-c14/

[sevstels]

If change the compilation mode, then the rest of the project wrong building. The principle "Either this or that".

I almost rework littlefs for C ++ without using macros. Macros are real Evil.
But unfortunately I could not correctly replace macros:

LFS_MKATTRS
LFS_MKTAG

with inline functions. If you can help me with this, then littlefs will build correctly in all cases.

For example like here:

/*
#define LFS_MKATTRS(...)
(struct lfs_mattr[]){VA_ARGS},
sizeof((struct lfs_mattr[]){VA_ARGS}) / sizeof(struct lfs_mattr)
*/

//=============================================================
inline struct lfs_mattr *LFS_MKATTRS( ...)
{
lfs_mattr *attr = NULL;
. . . . . .
return attr;
}

Thnk.

[geky]

Ah, unfortunately C++ is no longer a superset of C. As they bother developed they have diverged. I don't know the history there, but the version of C compatible with C++ (C89 I think?) lacks a lot of usability features (variables must be initialized at start of block, static, const, no C++ comments (//)), so I believe C99 is the best C standard to adopt at this time.

To combine C++/littlefs I would use two different compilation modes:
gcc -std=c99 lfs.c -o lfs.o
g++ -std=c++11 main.cpp -o main.o
g++ lfs.o main.o -o app.elf

If change the compilation mode, then the rest of the project wrong building. The principle "Either this or that".

That sounds like an IDE/build system limitation. What IDE/build system are you using? Can it not handle .c and .cpp files differently?

I almost rework littlefs for C ++ without using macros. Macros are real Evil.
But unfortunately I could not correctly replace macros:

LFS_MKATTRS
LFS_MKTAG

LFS_MKATTRS creates an array on the stack which is used to pass a LISP-like list of commands to lfs_dir_commit. This is one case where an inline function won't work as it needs a variable number of arguments.

It does this using compound literals, another feature in C99 but not in C++. I think the closest you can get is to create a class using parameter pack, but I don't know exactly what it would look like:
https://en.cppreference.com/w/cpp/language/parameter_pack

[sevstels]

I use IAR for ARM v8.32

For my taste, using macros on the stack makes the code unpredictable. This is why the project has so many error issues messages. The C ++ standard is specifically designed to improve the reliability of software. And practice shows us that the littlefs code is not reliable and not universal.

Later, I will probably complete a predictable stable version for C ++. When finished, I'll write a message here.

[geky]

A C++ port would be very interesting, at least to compare the two.