Compilation error on Linux

[FilipLaurentiu]

Any idea why I got this error ? I am not that good with C.. :disappointed:

➜  evoplus_cid git:(master) gcc ./jni/evoplus_cid.c -o evoplus_cid                                                               git:(master|) 
./jni/evoplus_cid.c: In function ‘parse_serial’:
./jni/evoplus_cid.c:107:14: error: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
  107 |         if ((strlen(str) > 2) && (str[0] == '0') &&
      |              ^~~~~~
./jni/evoplus_cid.c:6:1: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
    5 | #include "mmc.h"
  +++ |+#include <string.h>
    6 | 
./jni/evoplus_cid.c:107:14: warning: incompatible implicit declaration of built-in function ‘strlen’ [-Wbuiltin-declaration-mismatch]
  107 |         if ((strlen(str) > 2) && (str[0] == '0') &&
      |              ^~~~~~
./jni/evoplus_cid.c:107:14: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
./jni/evoplus_cid.c:109:23: error: implicit declaration of function ‘strtol’ [-Wimplicit-function-declaration]
  109 |                 val = strtol(str, NULL, 16);
      |                       ^~~~~~
./jni/evoplus_cid.c: In function ‘main’:
./jni/evoplus_cid.c:135:15: warning: incompatible implicit declaration of built-in function ‘strlen’ [-Wbuiltin-declaration-mismatch]
  135 |         len = strlen(argv[2]);
      |               ^~~~~~
./jni/evoplus_cid.c:135:15: note: include ‘<string.h>’ or provide a declaration of ‘strlen’
./jni/evoplus_cid.c:179:9: error: implicit declaration of function ‘close’; did you mean ‘pclose’? [-Wimplicit-function-declaration]
  179 |         close(fd);
      |         ^~~~~
      |         pclose

[raburton]

Your compiler has stricter options set than I had when I wrote this, and wants to see these standard c functions defined. Try adding the suggested include (string.h) to the top of the file.

On Thu, 2 May 2024, 1:47 pm Filip Laurentiu, @.***> wrote:

Any idea why I got this error ? I am not that good with C.. 😞

➜ evoplus_cid git:(master) gcc ./jni/evoplus_cid.c -o evoplus_cid git:(master|) ./jni/evoplus_cid.c: In function ‘parse_serial’: ./jni/evoplus_cid.c:107:14: error: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] 107 | if ((strlen(str) > 2) && (str[0] == '0') && | ^~ ./jni/evoplus_cid.c:6:1: note: include ‘’ or provide a declaration of ‘strlen’ 5 | #include "mmc.h" +++ |+#include 6 | ./jni/evoplus_cid.c:107:14: warning: incompatible implicit declaration of built-in function ‘strlen’ [-Wbuiltin-declaration-mismatch] 107 | if ((strlen(str) > 2) && (str[0] == '0') && | ^~ ./jni/evoplus_cid.c:107:14: note: include ‘’ or provide a declaration of ‘strlen’ ./jni/evoplus_cid.c:109:23: error: implicit declaration of function ‘strtol’ [-Wimplicit-function-declaration] 109 | val = strtol(str, NULL, 16); | ^~ ./jni/evoplus_cid.c: In function ‘main’: ./jni/evoplus_cid.c:135:15: warning: incompatible implicit declaration of built-in function ‘strlen’ [-Wbuiltin-declaration-mismatch] 135 | len = strlen(argv[2]); | ^~ ./jni/evoplus_cid.c:135:15: note: include ‘’ or provide a declaration of ‘strlen’ ./jni/evoplus_cid.c:179:9: error: implicit declaration of function ‘close’; did you mean ‘pclose’? [-Wimplicit-function-declaration] 179 | close(fd); | ^~~~~ | pclose

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[FilipLaurentiu]

Your compiler has stricter options set than I had when I wrote this, and wants to see these standard c functions defined. Try adding the suggested include (string.h) to the top of the file. … On Thu, 2 May 2024, 1:47 pm Filip Laurentiu, @.> wrote: Any idea why I got this error ? I am not that good with C.. 😞 ➜ evoplus_cid git:(master) gcc ./jni/evoplus_cid.c -o evoplus_cid git:(master|) ./jni/evoplus_cid.c: In function ‘parse_serial’: ./jni/evoplus_cid.c:107:14: error: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] 107 | if ((strlen(str) > 2) && (str[0] == '0') && | ^~ ./jni/evoplus_cid.c:6:1: note: include ‘’ or provide a declaration of ‘strlen’ 5 | #include "mmc.h" +++ |+#include 6 | ./jni/evoplus_cid.c:107:14: warning: incompatible implicit declaration of built-in function ‘strlen’ [-Wbuiltin-declaration-mismatch] 107 | if ((strlen(str) > 2) && (str[0] == '0') && | ^~ ./jni/evoplus_cid.c:107:14: note: include ‘’ or provide a declaration of ‘strlen’ ./jni/evoplus_cid.c:109:23: error: implicit declaration of function ‘strtol’ [-Wimplicit-function-declaration] 109 | val = strtol(str, NULL, 16); | ^~ ./jni/evoplus_cid.c: In function ‘main’: ./jni/evoplus_cid.c:135:15: warning: incompatible implicit declaration of built-in function ‘strlen’ [-Wbuiltin-declaration-mismatch] 135 | len = strlen(argv[2]); | ^~ ./jni/evoplus_cid.c:135:15: note: include ‘’ or provide a declaration of ‘strlen’ ./jni/evoplus_cid.c:179:9: error: implicit declaration of function ‘close’; did you mean ‘pclose’? [-Wimplicit-function-declaration] 179 | close(fd); | ^~~~~ | pclose — Reply to this email directly, view it on GitHub <#17>, or unsubscribe https://github.com/notifications/unsubscribe-auth/AADJ3B47U53IH3YMYVCAOO3ZAIYXRAVCNFSM6AAAAABHDU5RCCVHI2DSMVQWIX3LMV43ASLTON2WKOZSGI3TKNBVG43DMNY . You are receiving this because you are subscribed to this thread.Message ID: @.>

I made the changes but when I tried to make a PR to the repo I saw that there is already another PR fixing the same issue https://github.com/raburton/evoplus_cid/pull/8/commits/00e49cb2545f1e5e257217120bea2f1e0095a9b6

[raburton]

Yes, I'd forgotten about that. The PR wasn't accepted because of unrelated changes to the code, and being untested on Android build system.

[FilipLaurentiu]

Yes, I'd forgotten about that. The PR wasn't accepted because of unrelated changes to the code, and being untested on Android build system.

I made another one :)

[raburton]

Is it tested and building fine with android sdk?

[FilipLaurentiu]

Is it tested and building fine with android sdk?

no really..I tested only with linux. I can't test with Android SDK

[raburton]

That was the other half of the reason for not accepting the previous PR. This code is intended for Android (although also works on Linux) so needs to remain compatible with Android. It probably will still build fine, but I no longer have an Android build system to test with.