[asterisk-bugs] [JIRA] (ASTERISK-27156) Asterisk won't compile on Fedora 26 with devmode enabled.

[Corey Farrell (JIRA)]

Corey Farrell created ASTERISK-27156:
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             Summary: Asterisk won't compile on Fedora 26 with devmode enabled.
                 Key: ASTERISK-27156
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27156
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Core/BuildSystem
    Affects Versions: 14.6.0, 13.17.0, GIT
            Reporter: Corey Farrell
            Severity: Minor


It looks like gcc 7 includes a {{format-truncation}} warning which becomes an error in devmode.  The error occurs in many files, the following is from main/asterisk.c:

{noformat}
gcc -o /dev/null -c asterisk.i -pthread -I/home/cfarrell/code/asterisk/master/include    -I/usr/include/libxml2  -pipe -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations   -g3 -Werror -Wunused -Wdeclaration-after-statement -Wtrampolines -Wundef -Wmissing-format-attribute -Wformat=2  -O0  -march=native -I. -Ieditline -DAST_MODULE=\"core\" -DAST_IN_CORE  -O3
asterisk.c: In function ‘ast_readconfig’:
asterisk.c:3511:65: error: ‘/monitor’ directive output may be truncated writing 8 bytes into a region of size between 1 and 4096 [-Werror=format-truncation=]
  snprintf(cfg_paths.monitor_dir, sizeof(cfg_paths.monitor_dir), "%s/monitor", cfg_paths.spool_dir);
                                                                 ^~~~~~~~~~~~
asterisk.c:3511:2: note: ‘snprintf’ output between 9 and 4104 bytes into a destination of size 4096
  snprintf(cfg_paths.monitor_dir, sizeof(cfg_paths.monitor_dir), "%s/monitor", cfg_paths.spool_dir);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
asterisk.c:3512:69: error: ‘/recording’ directive output may be truncated writing 10 bytes into a region of size between 1 and 4096 [-Werror=format-truncation=]
  snprintf(cfg_paths.recording_dir, sizeof(cfg_paths.recording_dir), "%s/recording", cfg_paths.spool_dir);
                                                                     ^~~~~~~~~~~~~~
asterisk.c:3512:2: note: ‘snprintf’ output between 11 and 4106 bytes into a destination of size 4096
  snprintf(cfg_paths.recording_dir, sizeof(cfg_paths.recording_dir), "%s/recording", cfg_paths.spool_dir);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[1]: *** [/home/cfarrell/code/asterisk/master/Makefile.rules:135: asterisk.o] Error 1
make[1]: Leaving directory '/home/cfarrell/code/asterisk/master/main'
make: *** [Makefile:367: main] Error 2
{noformat}

I receive this error with all modes of {{DONT_OPTIMIZE}} and {{DOUBLE_COMPILE}}.



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