build: Improve --with-system-libc support.

* build-aux/build-lib.sh: Avoid building libc for --with-system-libc.
Make libmes richer.
build-aux/check-mescc.sh: Enable 50-malloc test.
* include/dirstream.h: Use HAVE_DIRSTREAM_H to cater for non-existing
dirstream.h.
* include/grp.h[SYSTEM_LIBC]: Typo.
* include/mes/lib.h (__brk, __call_at_exit)[SYSTEM_LIBC]: Declare.
* include/stdlib.h (comparison_fn_t)[SYSTEM_LIBC]: Declare.
* include/time.h (mktime): Return time_t.
* lib/posix/isatty.c [SYSTEM_LIBC]: Do not (re)declare termios.
* lib/stub/mktime.c (mktime): Return time_t.
* lib/tests/scaffold/41-ternary.c (main): Remove assumption that
locals are initialized.
* lib/tests/scaffold/70-stdarg.c: Cater for SYSTEM_LIBC.
* lib/tests/setjmp/80-setjmp.c: Declare jmp buf.
* lib/*/*.c: Add missing mes/lib.h, errno.h includes.

build-aux/build-lib.sh

@@ -52,6 +52,8 @@ fi
 
 libmes_SOURCES="
 $libc_mini_SOURCES
+lib/ctype/isnumber.c
+lib/mes/abtol.c
 lib/mes/itoa.c
 lib/mes/ltoa.c
 lib/mes/ltoab.c
@@ -70,12 +72,13 @@ lib/mes/oputc.c
 if test $mes_libc = mes; then
     libmes_SOURCES="$libmes_SOURCES
 lib/stdlib/atoi.c
-lib/mes/abtol.c
 lib/ctype/isdigit.c
-lib/ctype/isnumber.c
 lib/ctype/isspace.c
 lib/ctype/isxdigit.c
 "
+else
+    libmes_SOURCES="$libmes_SOURCES
+"
 fi
 
 libc_SOURCES="
@@ -184,55 +187,7 @@ lib/stub/ldexp.c
 lib/stub/mprotect.c
 lib/stub/localtime.c
 lib/stub/sigemptyset.c
-lib/ctype/islower.c
-lib/ctype/isupper.c
-lib/ctype/tolower.c
-lib/ctype/toupper.c
-lib/mes/search-path.c
-lib/posix/execvp.c
-lib/stdio/fclose.c
-lib/stdio/fdopen.c
-lib/stdio/ferror.c
-lib/stdio/fflush.c
-lib/stdio/fopen.c
-lib/stdio/fprintf.c
-lib/stdio/fread.c
-lib/stdio/fseek.c
-lib/stdio/ftell.c
-lib/stdio/fwrite.c
-lib/stdio/printf.c
-lib/stdio/remove.c
-lib/stdio/snprintf.c
-lib/stdio/sprintf.c
-lib/stdio/sscanf.c
-lib/stdio/vfprintf.c
-lib/stdio/vprintf.c
-lib/stdio/vsnprintf.c
-lib/stdio/vsprintf.c
-lib/stdio/vsscanf.c
-lib/stdlib/calloc.c
-lib/stdlib/qsort.c
-lib/stdlib/strtof.c
-lib/stdlib/strtol.c
-lib/stdlib/strtold.c
-lib/stdlib/strtoll.c
-lib/stdlib/strtoul.c
-lib/stdlib/strtoull.c
-lib/string/memmem.c
-lib/string/memmove.c
-lib/string/strcat.c
-lib/string/strchr.c
-lib/string/strlwr.c
-lib/string/strncpy.c
-lib/string/strrchr.c
-lib/string/strstr.c
-lib/string/strupr.c
-lib/stub/sigaction.c
-lib/stub/ldexp.c
-lib/stub/mprotect.c
-lib/stub/localtime.c
-lib/stub/sigemptyset.c
-xslib/stub/strtod.c
+lib/stub/strtod.c
 lib/$mes_cpu-mes-$compiler/setjmp.c
 "
 
@@ -367,10 +322,12 @@ if test -e libmes.s; then
     cp libmes.s $mes_cpu-mes
 fi
 
-archive libc.a $libc_SOURCES
-cp libc.a $mes_cpu-mes
-if test -e libc.s; then
-    cp libc.S $mes_cpu-mes
+if test $mes_libc = mes; then
+    archive libc.a $libc_SOURCES
+    cp libc.a $mes_cpu-mes
+    if test -e libc.s; then
+        cp libc.s $mes_cpu-mes
+    fi
 fi
 
 archive libc+tcc.a $libc_tcc_SOURCES

build-aux/check-mescc.sh

@@ -101,6 +101,7 @@ lib/tests/scaffold/48-global-static.c
 lib/tests/assert/50-assert.c
 lib/tests/mes/50-itoa.c
 lib/tests/posix/50-getenv.c
+lib/tests/stdlib/50-malloc.c
 lib/tests/string/50-strcmp.c
 lib/tests/string/50-strcpy.c
 lib/tests/string/50-strncmp.c

build-aux/test-c.sh

@@ -50,7 +50,7 @@ fi
 
 if test $mes_libc = system; then
     crt1=
-    LIBS=-lmes
+    LIBS='-l mes'
 else
     crt1=crt1.o
 fi

include/dirstream.h

@@ -22,7 +22,7 @@
 #ifndef __MES_DIRSTREAM_H
 #define __MES_DIRSTREAM_H 1
 
-#if SYSTEM_LIBC
+#if SYSTEM_LIBC && HAVE_DIRSTREAM_H
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif

include/grp.h

@@ -22,7 +22,7 @@
 
 #if SYSTEM_LIBC
 #undef __MES_GRP_H
-#include_next <pwd.h>
+#include_next <grp.h>
 #else // ! SYSTEM_LIBC
 
 #include <sys/types.h>

include/mes/lib.h

@@ -41,6 +41,7 @@ char * fdgets (char *s, int count, int fd);
 int fdputc (int c, int fd);
 int fdputs (char const *s, int fd);
 int fdungetc (int c, int fd);
+int isnumber (int c, int base);
 int mes_open (char const *file_name, int flags, int mask);
 int _open2 (char const *file_name, int flags);
 int _open3 (char const *file_name, int flags, int mask);
@@ -48,10 +49,10 @@ int oputc (int c);
 int oputs (char const *s);
 char *search_path (char const *file_name);
 
-#if !SYSTEM_LIBC
-
 extern char *__brk;
 extern void (*__call_at_exit) (void);
+
+#if !SYSTEM_LIBC
 void __assert_fail (char *s);
 void _exit (int code);
 long brk (void *addr);

include/stdlib.h

@@ -20,6 +20,11 @@
 #ifndef __MES_STDLIB_H
 #define __MES_STDLIB_H 1
 
+#ifndef __MES_COMPARISON_FN_T
+#define __MES_COMPARISON_FN_T
+typedef int (*comparison_fn_t) (void const *, void const *);
+#endif
+
 #if SYSTEM_LIBC
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
@@ -56,11 +61,6 @@ unsigned long long strtoull (char const *string, char **tailptr, int base);
 #define EXIT_FAILURE 1
 #define EXIT_SUCCESS 0
 
-#ifndef __MES_COMPARISON_FN_T
-#define __MES_COMPARISON_FN_T
-typedef int (*comparison_fn_t) (void const *, void const *);
-#endif
-
 void *bsearch (void const *key, void const *array, size_t count, size_t size, comparison_fn_t compare);
 
 #endif // ! SYSTEM_LIBC

include/time.h

@@ -59,6 +59,7 @@ struct timespec
 int clock_gettime (clockid_t clk_id, struct timespec *tp);
 struct tm *localtime (time_t const *timep);
 struct tm *gmtime (time_t const *time);
+int nanosleep (struct timespec const *requested_time, struct timespec const *remaining);
 time_t time (time_t * tloc);
 
 #endif // ! SYSTEM_LIBC

lib/dirent/__getdirentries.c

@@ -21,6 +21,7 @@
 
 // Taken from GNU C Library 1.06.4
 
+#include <mes/lib.h>
 #include <dirent.h>
 #include <stdio.h>
 #include <unistd.h>

lib/dirent/opendir.c

@@ -21,6 +21,7 @@
 
 // Taken from GNU C Library 2.2.5
 
+#include <mes/lib.h>
 #include <errno.h>
 #include <limits.h>
 #include <stddef.h>

lib/posix/isatty.c

@@ -24,6 +24,7 @@
 #include <string.h>
 #include <termio.h>
 
+#if !SYSTEM_LIBC
 typedef unsigned char cc_t;
 typedef unsigned int speed_t;
 typedef unsigned int tcflag_t;
@@ -39,6 +40,7 @@ struct termios
   cc_t c_line;
   cc_t c_cc[NCCS];
 };
+#endif
 
 struct ktermios
 {

lib/stdio/clearerr.c

@@ -18,6 +18,8 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
+#include <errno.h>
 #include <stdio.h>
 
 void

lib/stdio/fprintf.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <stdarg.h>
 #include <stdio.h>
 

lib/stdio/perror.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>

lib/stdio/printf.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <stdarg.h>
 #include <stdio.h>
 
@@ -26,7 +27,7 @@ printf (char const *format, ...)
 {
   va_list ap;
   int r;
-#if __GNUC__ && __x86_64__
+#if __GNUC__ && __x86_64__ && !SYSTEM_LIBC
 #define __FUNCTION_ARGS 1
   ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
 #undef __FUNCTION_ARGS

lib/stdio/snprintf.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <stdarg.h>
 #include <stdio.h>
 
@@ -26,7 +27,7 @@ snprintf (char *str, size_t size, char const *format, ...)
 {
   va_list ap;
   int r;
-#if __GNUC__ && __x86_64__
+#if __GNUC__ && __x86_64__ && !SYSTEM_LIBC
 #define __FUNCTION_ARGS 3
   ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
 #undef __FUNCTION_ARGS

lib/stdio/sprintf.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <stdarg.h>
 #include <stdio.h>
 
@@ -26,7 +27,7 @@ sprintf (char *str, char const *format, ...)
 {
   va_list ap;
   int r;
-#if __GNUC__ && __x86_64__
+#if __GNUC__ && __x86_64__ && !SYSTEM_LIBC
 #define __FUNCTION_ARGS 2
   ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
 #undef __FUNCTION_ARGS

lib/stdio/sscanf.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <stdarg.h>
 #include <stdio.h>
 

lib/stdio/vprintf.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <stdarg.h>
 #include <stdio.h>
 

lib/stub/chown.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <unistd.h>
 
 int

lib/stub/ctime.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <time.h>
 
 int

lib/stub/fpurge.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <stdio.h>
 
 int

lib/stub/freadahead.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <stdio.h>
 
 size_t

lib/stub/fscanf.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <unistd.h>
 
 int

lib/stub/getlogin.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <unistd.h>
 
 char *

lib/stub/getpwnam.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <pwd.h>
 
 struct passwd *

lib/stub/getpwuid.c

@@ -19,10 +19,11 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <pwd.h>
 
 struct passwd *
-getpwuid ()
+getpwuid (uid_t uid)
 {
   static int stub = 0;
   if (__mes_debug () && !stub)

lib/stub/gmtime.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <time.h>
 #include <sys/time.h>
 

lib/stub/localtime.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <time.h>
 #include <sys/time.h>
 

lib/stub/pclose.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 pclose (int x)

lib/stub/popen.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 popen (int x)

lib/stub/rand.c

@@ -19,7 +19,7 @@
  */
 
 #include <mes/lib.h>
-#include <pwd.h>
+#include <errno.h>
 
 int
 rand (void)

lib/stub/rewind.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 rewind (int x)

lib/stub/setbuf.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 setbuf (int x)

lib/stub/sigsetmask.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 sigsetmask (int x)

lib/stub/sys_siglist.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 sys_siglist (int x)

lib/stub/system.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 system (int x)

lib/stub/ttyname.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 #include <unistd.h>
 
 char *

lib/stub/umask.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 umask (int x)

lib/stub/utime.c

@@ -19,6 +19,7 @@
  */
 
 #include <mes/lib.h>
+#include <errno.h>
 
 int
 utime (int x)

lib/tests/io/90-stat.c

@@ -18,6 +18,7 @@
  * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <mes/lib.h>
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>

lib/tests/scaffold/41-ternary.c

@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -23,7 +23,7 @@
 int
 main ()
 {
-  int f;
+  int f = 0;
   int t = 1;
   int one = t;
 

lib/tests/scaffold/70-stdarg.c

@@ -30,7 +30,7 @@ stdarg1 (long *one, ...)
   int r;
 
   va_start (ap, one);
-#if __GNUC__ && __x86_64__
+#if __GNUC__ && __x86_64__ && !SYSTEM_LIBC
 #define __FUNCTION_ARGS 1
   ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
 #undef __FUNCTION_ARGS
@@ -54,7 +54,7 @@ stdarg2 (long *one, long *two, ...)
   int r;
 
   va_start (ap, two);
-#if __GNUC__ && __x86_64__
+#if __GNUC__ && __x86_64__ && !SYSTEM_LIBC
 #define __FUNCTION_ARGS 2
   ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
 #undef __FUNCTION_ARGS
@@ -78,7 +78,7 @@ stdarg3 (long *one, long *two, long *three, ...)
   int r;
 
   va_start (ap, three);
-#if __GNUC__ && __x86_64__
+#if __GNUC__ && __x86_64__ && !SYSTEM_LIBC
 #define __FUNCTION_ARGS 3
   ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
 #undef __FUNCTION_ARGS

lib/tests/setjmp/80-setjmp.c

@@ -25,6 +25,7 @@
 #include <setjmp.h>
 
 int foo;
+jmp_buf buf;
 
 void
 second ()