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authorSimon Marchi <simon.marchi@efficios.com>2020-03-20 11:57:49 -0400
committerSimon Marchi <simon.marchi@efficios.com>2020-03-20 11:57:49 -0400
commitc884cc46193c98fd0b90ce8a79c081f6a1c18cc6 (patch)
tree4881f686ec5c7cd8f44ead22588fee7cc59f78c1 /gdb/configure
parent1ff700c202465275d1ca3aee4dd979db36274294 (diff)
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gdb: remove HAVE_DECL_PTRACE
I stumbled on this snippet in nat/gdb_ptrace.h: /* Some systems, in particular DEC OSF/1, Digital Unix, Compaq Tru64 or whatever it's called these days, don't provide a prototype for ptrace. Provide one to silence compiler warnings. */ #ifndef HAVE_DECL_PTRACE extern PTRACE_TYPE_RET ptrace(); #endif I believe this is unnecessary today and should be removed. First, the comment only mentions OSes we don't support (and to be honest, I had never even heard of). But most importantly, in C++, a declaration with empty parenthesis declares a function that accepts no arguments, unlike in C. So if this declaration was really used, GDB wouldn't build, since all ptrace call sites pass some arguments. Since we haven't heard anything about this causing some build failures since we have transitioned to C++, I conclude that it's not used. This patch removes it as well as the corresponding configure check. gdb/ChangeLog: * ptrace.m4: Don't check for ptrace declaration. * config.in: Re-generate. * configure: Re-generate. * nat/gdb_ptrace.h: Don't declare ptrace if HAVE_DECL_PTRACE is not defined. gdbserver/ChangeLog: * config.in: Re-generate. * configure: Re-generate. gdbsupport/ChangeLog: * config.in: Re-generate. * configure: Re-generate.
Diffstat (limited to 'gdb/configure')
-rwxr-xr-xgdb/configure20
1 files changed, 0 insertions, 20 deletions
diff --git a/gdb/configure b/gdb/configure
index 614f340..afafc2c 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -15000,26 +15000,6 @@ gdb_ptrace_headers='
# include <unistd.h>
#endif
'
-# There is no point in checking if we don't have a prototype.
-ac_fn_c_check_decl "$LINENO" "ptrace" "ac_cv_have_decl_ptrace" "$gdb_ptrace_headers
-"
-if test "x$ac_cv_have_decl_ptrace" = xyes; then :
- ac_have_decl=1
-else
- ac_have_decl=0
-fi
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_DECL_PTRACE $ac_have_decl
-_ACEOF
-if test $ac_have_decl = 1; then :
-
-else
-
- : ${gdb_cv_func_ptrace_ret='int'}
- : ${gdb_cv_func_ptrace_args='int,int,long,long'}
-
-fi
# Check return type. Varargs (used on GNU/Linux) conflict with the
# empty argument list, so check for that explicitly.