compile problem: comparison between pointer and zero character constant [-Wpointer-compare] #47
Description
Hi,
When I compile the C files, I get such warnings:
/root/miniconda3/bin/x86_64-conda-linux-gnu-cc -std=c99 -DNDEBUG -D_FORTIFY_SOURCE=2 -O2 -isystem /root/miniconda3/include -O3 -g -Wall --pedantic -funroll-loops -DNDEBUG -I../externalTools/quicktree_1.1/include/ -march=nocona -mtune=haswell -ftree-vectorize -fPIC -fstack-protector-strong -fno-plt -O2 -ffunction-sections -pipe -isystem /root/miniconda3/include -I inc -I ../lib/ -c impl/*.c
impl/bioioC.c: In function 'parseInt':
impl/bioioC.c:268:23: warning: comparison between pointer and zero character constant [-Wpointer-compare]
268 | while(*string != '\0' && !isspace(**string)) {
| ^~
impl/bioioC.c:268:15: note: did you mean to dereference the pointer?
268 | while(*string != '\0' && !isspace(**string)) {
| ^
impl/bioioC.c: In function 'parseFloat':
impl/bioioC.c:289:23: warning: comparison between pointer and zero character constant [-Wpointer-compare]
289 | while(*string != '\0' && !isspace(**string)) {
| ^~
impl/bioioC.c:289:15: note: did you mean to dereference the pointer?
289 | while(*string != '\0' && !isspace(**string)) {
| ^
impl/bioioC.c: In function 'parseString':
impl/bioioC.c:310:23: warning: comparison between pointer and zero character constant [-Wpointer-compare]
310 | while(*string != '\0' && !isspace(**string)) {
| ^~
impl/bioioC.c:310:15: note: did you mean to dereference the pointer?
310 | while(*string != '\0' && !isspace(**string)) {
| ^
impl/sonLibList.c: In function 'st_list_sortP':
impl/sonLibList.c:258:13: warning: ISO C forbids conversion of object pointer to function pointer type [-Wpedantic]
258 | return ((int (*)(const void *, const void *))fn)(*((char **)a), *((char **)b));
| ^
impl/sonLibList.c: In function 'stList_sort':
impl/sonLibList.c:262:76: warning: ISO C forbids conversion of function pointer to object pointer type [-Wpedantic]
262 | sort_r(list->list, stList_length(list), sizeof(void *), st_list_sortP, (void *)cmpFn);
| ^
impl/sonLibList.c: In function 'st_list_sort2P':
impl/sonLibList.c:267:56: warning: ISO C forbids conversion of object pointer to function pointer type [-Wpedantic]
267 | int (*cmpFn)(const void *, const void *, void *) = (int (*)(const void *, const void *, void *))(((void **)extra)[0]);
| ^
impl/sonLibList.c: In function 'stList_sort2':
impl/sonLibList.c:273:24: warning: ISO C forbids conversion of function pointer to object pointer type [-Wpedantic]
273 | void *extra[2] = { (void *)cmpFn, (void *)extraArg };
and finally when I try commands in ./bin, I get Segmentation fault. I think it's the pointer problem, but I see many platforms and get no solutions.
Thanks!