Package: gcc Version: 4:4.4.5-1 Severity: minor Tags: patch
The c99-gcc wrapper script detects conflicting -std=* options and flags them as errors before invoking gcc. The same logic should extend to the -ansi option, which is identical to -std=c89; otherwise, the -ansi option overrides -std=c99 and turns the compilation into ISO C90 instead of ISO C99. Example session compiling the attached program with current c99-gcc: $ c99 --version gcc (Debian 4.4.5-8) 4.4.5 Copyright (C) 2010 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ c99 -Wall -D_XOPEN_SOURCE=600 democ99.c -lm $ c99 -std=c89 -Wall -D_XOPEN_SOURCE=600 democ99.c -lm c99 called with non ANSI/ISO C option -std=c89 $ c99 -ansi -Wall -D_XOPEN_SOURCE=600 democ99.c -lm democ99.c:24: error: expected identifier or ‘(’ before ‘/’ token democ99.c:27: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘static’ democ99.c: In function ‘main’: democ99.c:36: error: ‘zarray’ undeclared (first use in this function) democ99.c:36: error: (Each undeclared identifier is reported only once democ99.c:36: error: for each function it appears in.) democ99.c:38: error: ‘for’ loop initial declarations are only allowed in C99 mode democ99.c:38: note: use option -std=c99 or -std=gnu99 to compile your code democ99.c:40: error: redefinition of ‘i’ democ99.c:38: note: previous definition of ‘i’ was here democ99.c:40: error: ‘for’ loop initial declarations are only allowed in C99 mode democ99.c:40: warning: implicit declaration of function ‘zprint’ The included patch against the c99 script gives the desired behavior: $ c99 -ansi -Wall -D_XOPEN_SOURCE=600 democ99.c -lm c99 called with non ANSI/ISO C option -ansi -- System Information: Debian Release: 6.0 APT prefers proposed-updates APT policy: (500, 'proposed-updates'), (500, 'stable'), (101, 'unstable') Architecture: amd64 (x86_64) Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages gcc depends on: ii cpp 4:4.4.5-1 The GNU C preprocessor (cpp) ii gcc-4.4 4.4.5-8 The GNU C compiler Versions of packages gcc recommends: ii libc6-dev [libc-dev] 2.11.2-10 Embedded GNU C Library: Developmen Versions of packages gcc suggests: pn autoconf <none> (no description available) pn automake1.9 <none> (no description available) ii bison 1:2.4.1.dfsg-3 A parser generator that is compati ii flex 2.5.35-10 A fast lexical analyzer generator. ii gcc-doc 5:3 documentation for the GNU compiler ii gcc-multilib 4:4.4.5-1 The GNU C compiler (multilib files ii gdb 7.0.1-2+b1 The GNU Debugger pn libtool <none> (no description available) ii make 3.81-8 An utility for Directing compilati ii manpages-dev 3.27-1 Manual pages about using GNU/Linux -- no debconf information
/* democ99.c - Demonstration program to separate C89 from C99 * * Copyright (C) 2011 Mike Miller * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <math.h> #include <stdlib.h> #include <stdio.h> #include <complex.h> #include <stdbool.h> // File-scoped complex value array to be initialized at run-time. static long double complex *zarray; inline static void zprint(long double complex z, FILE *restrict stream) { fprintf(stream, "(%Lf,%Lf)\n", creall(z), cimagl(z)); } int main(int argc, char *argv[]) { bool ok = true; zarray = malloc(16 * sizeof(long double complex)); for (int i = 0; i < 16; i++) zarray[i] = cexpl(I * M_PI * i / 8); for (int i = 0; i < 16; i++) zprint(zarray[i], stdout); free(zarray); exit(ok ? EXIT_SUCCESS : EXIT_FAILURE); }
Index: c99 =================================================================== --- c99 (revision 5085) +++ c99 (working copy) @@ -14,7 +14,7 @@ -std=c9[9x]|-std=iso9899:199[9x]) extra_flag= ;; - -std=*) + -std=*|-ansi) echo >&2 "`basename $0` called with non ANSI/ISO C option $i" exit 1 ;;
