Commit 9d80be9ab5cc17011c634e0348c64c15fcba95bf adds the following compiler
flag:
dualbus@debian:~/src/gnu/bash$ cat -n configure.ac | grep Werror -C3
1159 CFLAGS="$CFLAGS -Wno-parentheses -Wno-format-security"
1160 if test -n "$DEBUG"
1161 then
~>1162 CFLAGS="$CFLAGS -Werror"
1163 fi
1164 fi
1165
During build (with gcc):
dualbus@debian:~/src/gnu/bash$ make -j$(nproc) -s
make[1]: warning: -j4 forced in submake: resetting jobserver mode.
./parse.y: warning: 1 shift/reduce conflict [-Wconflicts-sr]
make[1]: warning: -j4 forced in submake: resetting jobserver mode.
expr.c:217:17: error: conflicting types for built-in function ‘exp2’
[-Werror=builtin-declaration-mismatch]
static intmax_t exp2 __P((void));
^~~~
cc1: all warnings being treated as errors
I know the `exp2' function here has nothing to do with the built-in exponential
function, and that it has had that name for a long time, but the build breaks
due to that.
To hack around it, I renamed it from `exp2' to `exp22', and then it broke here:
dualbus@debian:~/src/gnu/bash$ make -j$(nproc) -s
make[1]: warning: -j4 forced in submake: resetting jobserver mode.
***********************************************************
* *
* GNU bash, version 5.0.0(1)-rc1 (x86_64-pc-linux-gnu)
* *
***********************************************************
making lib/glob/libglob.a in ./lib/glob
make[1]: warning: -j4 forced in submake: resetting jobserver mode.
smatch.c: In function ‘_fnmatch_fallback_wc’:
smatch.c:318:11: error: implicit declaration of function ‘fnmatch’; did you
mean ‘gmatch’? [-Werror=implicit-function-declaration]
return (fnmatch ((const char *)w2, (const char *)w1, 0));
^~~~~~~
gmatch
Which I believe is an actual issue and I assume the fix is along the lines of:
dualbus@debian:~/src/gnu/bash$ git diff -- lib/
diff --git a/lib/glob/smatch.c b/lib/glob/smatch.c
index 3826c93e..9150a28e 100644
--- a/lib/glob/smatch.c
+++ b/lib/glob/smatch.c
@@ -25,6 +25,7 @@
#include "strmatch.h"
#include <chartypes.h>
+#include <fnmatch.h>
#include "bashansi.h"
#include "shmbutil.h"
I'm not sure what to do about `exp2' though. Personally, I'd love for these
functions to have slighly more meaningful names.
I also tried clang version 7.0.1-+rc3-2, which gives an additional error:
making lib/sh/libsh.a in ./lib/sh
(...)
getenv.c:55:7: error: comparison of nonnull parameter 'name' equal to a null
pointer is 'false' on first encounter [-Werror,-Wtautological-pointer-compare]
if (name == 0 || *name == '\0')
^~~~ ~
/usr/include/stdlib.h:631:50: note: declared 'nonnull' here
extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
^
/usr/include/x86_64-linux-gnu/sys/cdefs.h:293:44: note: expanded from macro
'__nonnull'
# define __nonnull(params) __attribute__ ((__nonnull__ params))
This is due to the stdlib.h header being pulled by bashansi.h in
lib/sh/getenv.c, thus, providing a function signature that doesn't match Bash's
re-definition of getenv():
dualbus@debian:~/src/gnu/bash$ grep bashansi.h lib/sh/getenv.c
#include <bashansi.h>
dualbus@debian:~/src/gnu/bash$ grep stdlib.h bashansi.h
# include <stdlib.h>
# include "ansi_stdlib.h"
~~~
Additional information:
gcc:
dualbus@debian:~/src/gnu/bash$ cc -v
Using built-in specs.
COLLECT_GCC=cc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.2.0-12'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.2.0 (Debian 8.2.0-12)
clang:
dualbus@debian:~/src/gnu/bash$ clang -v
clang version 7.0.1-+rc3-2 (tags/RELEASE_701/rc3)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8
Candidate multilib: .;@m64
Selected multilib: .;@m64
