https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107794
Bug ID: 107794 Summary: can't use the string "linux-" via stringizing in the preprocessor Product: gcc Version: 11.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: preprocessor Assignee: unassigned at gcc dot gnu.org Reporter: coder5506 at pobox dot com Target Milestone: --- The program (scratch.c): #include <stdio.h> #define str(s) #s #define xstr(s) str(s) #define STRING linux-aarch64.cf int main() { printf("%s\n", xstr(STRING)); } The output (running ./a.out): 1-aarch64.cf Expected output: linux-aarch64.cf It works as expected for any string not exactly matching "linux-", but in everything I've tried "linux-" is always shortened to "l-" even when not at the beginning of the string. > the exact version of GCC; > the system type; gcc 10.2.1 on Debian 11 x86_64 gcc 10.2.1 on Armbian (Debian 11) aarch64 gcc 11.3.0 on Arbmian (Debian 11) aarch64 > the options given when GCC was configured/built; In building 11.3.0, I passed "--enable-languages=c --disable-multilib" > the complete command line that triggers the bug; gcc -Wall -Wextra -save-temps scratch.c > the compiler output (error messages, warnings, etc.); and none > the preprocessed file (*.i*) that triggers the bug, generated by adding > -save-temps to the complete compilation command Truncated, but here's how it ends # 858 "/usr/include/stdio.h" 3 4 extern int __uflow (FILE *); extern int __overflow (FILE *, int); # 873 "/usr/include/stdio.h" 3 4 # 2 "scratch.c" 2 # 5 "scratch.c" int main() { printf("%s\n", "1-aarch64.cf"); }