After the gcc upgrade to gcc7.1, gcc7 contains a number of enhancements that
help detect buffer overflow and other forms of invalid memory accesses. We
can check the changes here:
https://gcc.gnu.org/gcc-7/changes.html
When gcc7 compiling squid, it outputs error:
error: '%s' directive output may be truncated writing up to 8191 bytes
into a region of size 8188 [-Werror=format-truncation=]
This is because the gcc7 detect the program may have buffer overflow, so it
outputs warning, in the squid's Makefile, the Makefile treat the warning as
error by setting: -Werror, in order to compile it successfully, we should
not treat the warning as error.
Signed-off-by: Dengke Du <[email protected]>
---
acinclude/compiler-flags.m4 | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/acinclude/compiler-flags.m4 b/acinclude/compiler-flags.m4
index bd12a83..5f704fa 100644
--- a/acinclude/compiler-flags.m4
+++ b/acinclude/compiler-flags.m4
@@ -133,8 +133,8 @@ AC_DEFUN([SQUID_CC_GUESS_OPTIONS], [
AC_MSG_CHECKING([for compiler variant])
case "$squid_cv_compiler" in
gcc)
- squid_cv_cc_option_werror="-Werror"
- squid_cv_cxx_option_werror="-Werror"
+ squid_cv_cc_option_werror="-Werror -Wno-error=format-truncation
-Wno-error=int-in-bool-context"
+ squid_cv_cxx_option_werror="-Werror -Wno-error=format-truncation
-Wno-error=int-in-bool-context"
squid_cv_cc_option_wall="-Wall"
squid_cv_cc_option_optimize="-O3"
squid_cv_cc_arg_pipe="-pipe"
--
2.11.0
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