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gcc -c -DHEXTOGGLE_VERSION="1.0.1" src/tempfile.c -o build/tempfile.o  -O1 -O3 -g -Wall -std=c11
src/tempfile.c: In function 'open_temporary_file':
src/tempfile.c:27:14: warning: implicit declaration of function 'mkstemp' [-Wimplicit-function-declaration]
   27 |     int fd = mkstemp(filename);
      |              ^~~~~~~
src/tempfile.c:33:18: warning: implicit declaration of function 'fdopen'; did you mean 'fopen'? [-Wimplicit-function-declaration]
   33 |     FILE *file = fdopen(fd, "wb");
      |                  ^~~~~~
      |                  fopen
src/tempfile.c:33:18: warning: initialization of 'FILE *' {aka 'struct _IO_FILE *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]