https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77708
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- Author: msebor Date: Sun Jan 8 23:42:09 2017 New Revision: 244210 URL: https://gcc.gnu.org/viewcvs?rev=244210&root=gcc&view=rev Log: PR tree-optimization/78913 - Probably misleading error reported by -Wformat-length PR middle-end/77708 - -Wformat-length %s warns for snprintf gcc/ChangeLog: PR middle-end/77708 * doc/invoke.texi (Warning Options): Document -Wformat-truncation. * gimple-ssa-sprintf.c (call_info::reval_used, call_info::warnopt): New member functions. (format_directive): Used them. (add_bytes): Same. (pass_sprintf_length::handle_gimple_call): Same. * graphite-sese-to-poly.c (tree_int_to_gmp): Increase buffer size to avoid truncation for any argument. (extract_affine_mul): Same. * tree.c (get_file_function_name): Same. gcc/c-family/ChangeLog: PR middle-end/77708 * c.opt (-Wformat-truncation): New option. gcc/fortran/ChangeLog: PR tree-optimization/78913 PR middle-end/77708 * trans-common.c (build_equiv_decl): Increase buffer size to avoid truncation for any argument. * trans-types.c (gfc_build_logical_type): Same. gcc/testsuite/ChangeLog: PR middle-end/77708 * gcc.dg/tree-ssa/builtin-snprintf-warn-1.c: New test. * gcc.dg/tree-ssa/builtin-snprintf-warn-2.c: New test. * gcc.dg/tree-ssa/builtin-sprintf-warn-6.c: XFAIL test cases failing due to bug 78969. * gcc.dg/format/pr78569.c: Adjust. Added: trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-warn-1.c trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-snprintf-warn-2.c Modified: trunk/gcc/ChangeLog trunk/gcc/c-family/ChangeLog trunk/gcc/c-family/c.opt trunk/gcc/doc/invoke.texi trunk/gcc/fortran/ChangeLog trunk/gcc/fortran/trans-common.c trunk/gcc/fortran/trans-types.c trunk/gcc/gimple-ssa-sprintf.c trunk/gcc/graphite-sese-to-poly.c trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.dg/format/pr78569.c trunk/gcc/testsuite/gcc.dg/tree-ssa/builtin-sprintf-warn-6.c trunk/gcc/tree.c
