1999-10-06 Akim Demaille <akim@epita.fr>exp-dead-endexperimental

	* acspecific.m4: Various formatting changes.
	* acspecific.m4 (AC_PROG_CC_WORKS): Declare main returns an int.

3 files changed, 183 insertions, 72 deletions

diff --git a/ChangeLog b/ChangeLog
index ef1fc96a..036b2a4c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,11 @@
 	* acspecific.m4 (AC_CHECK_HEADER_DIRENT): Reintroduce its
 	AC_DEFUN.
 
+1999-10-06  Akim Demaille  <akim@epita.fr>
+
+	* acspecific.m4: Various formatting changes.
+	* acspecific.m4 (AC_PROG_CC_WORKS): Declare main returns an int.
+
 1999-10-05  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>
 
 	Shell meta characters in an argument causes the configure script
diff --git a/acspecific.m4 b/acspecific.m4
index 2f2f79f5..bd623c0c 100644
--- a/acspecific.m4
+++ b/acspecific.m4
@@ -175,7 +175,8 @@ dnl
 dnl AC_PROG_F77()
 AC_DEFUN(AC_PROG_F77,
 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
-AC_CHECK_PROGS(F77, ifelse([$1], , [g77 f77 xlf cf77 fl32 fort77 f90 xlf90 f2c], [$1]))
+AC_CHECK_PROGS(F77,
+               m4_default([$1], [g77 f77 xlf cf77 fl32 fort77 f90 xlf90 f2c]))
 
 AC_PROG_F77_WORKS
 AC_PROG_F77_GNU
@@ -202,11 +203,14 @@ else
 fi
 ])
 
+dnl AC_PROG_CC_WORKS
+dnl ----------------
 AC_DEFUN(AC_PROG_CC_WORKS,
 [AC_MSG_CHECKING([whether the C compiler ($CC $CFLAGS $CPPFLAGS $LDFLAGS) works])
 AC_LANG_SAVE
 AC_LANG_C
-AC_TRY_COMPILER([main(){return(0);}], ac_cv_prog_cc_works, ac_cv_prog_cc_cross)
+AC_TRY_COMPILER([int main(){return(0);}],
+                ac_cv_prog_cc_works, ac_cv_prog_cc_cross)
 AC_LANG_RESTORE
 AC_MSG_RESULT($ac_cv_prog_cc_works)
 if test $ac_cv_prog_cc_works = no; then
@@ -217,11 +221,14 @@ AC_MSG_RESULT($ac_cv_prog_cc_cross)
 cross_compiling=$ac_cv_prog_cc_cross
 ])
 
+dnl AC_PROG_CXX_WORKS
+dnl -----------------
 AC_DEFUN(AC_PROG_CXX_WORKS,
 [AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $CPPFLAGS $LDFLAGS) works])
 AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
-AC_TRY_COMPILER([int main(){return(0);}], ac_cv_prog_cxx_works, ac_cv_prog_cxx_cross)
+AC_TRY_COMPILER([int main(){return(0);}],
+                ac_cv_prog_cxx_works, ac_cv_prog_cxx_cross)
 AC_LANG_RESTORE
 AC_MSG_RESULT($ac_cv_prog_cxx_works)
 if test $ac_cv_prog_cxx_works = no; then
@@ -232,12 +239,12 @@ AC_MSG_RESULT($ac_cv_prog_cxx_cross)
 cross_compiling=$ac_cv_prog_cxx_cross
 ])
 
+dnl AC_PROG_F77_WORKS
+dnl -----------------
 dnl Test whether the Fortran 77 compiler can compile and link a trivial
 dnl Fortran program.  Also, test whether the Fortran 77 compiler is a
 dnl cross-compiler (which may realistically be the case if the Fortran
 dnl compiler is `g77').
-dnl
-dnl AC_PROG_F77_WORKS()
 AC_DEFUN(AC_PROG_F77_WORKS,
 [AC_MSG_CHECKING([whether the Fortran 77 compiler ($F77 $FFLAGS $LDFLAGS) works])
 AC_LANG_SAVE
@@ -256,6 +263,8 @@ AC_MSG_RESULT($ac_cv_prog_f77_cross)
 cross_compiling=$ac_cv_prog_f77_cross
 ])
 
+dnl AC_PROG_CC_GNU
+dnl --------------
 AC_DEFUN(AC_PROG_CC_GNU,
 [AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc,
 [dnl The semicolon is to pacify NeXT's syntax-checking cpp.
@@ -270,6 +279,8 @@ else
   ac_cv_prog_gcc=no
 fi])])
 
+dnl AC_PROG_CXX_GNU
+dnl ---------------
 AC_DEFUN(AC_PROG_CXX_GNU,
 [AC_CACHE_CHECK(whether we are using GNU C++, ac_cv_prog_gxx,
 [dnl The semicolon is to pacify NeXT's syntax-checking cpp.
@@ -284,11 +295,11 @@ else
   ac_cv_prog_gxx=no
 fi])])
 
+dnl AC_PROG_F77_GNU
+dnl ---------------
 dnl Test whether for Fortran 77 compiler is `g77' (the GNU Fortran 77
 dnl Compiler).  This test depends on whether the Fortran 77 compiler can
 dnl do CPP pre-processing.
-dnl
-dnl AC_PROG_F77_GNU()
 AC_DEFUN(AC_PROG_F77_GNU,
 [AC_CACHE_CHECK(whether we are using GNU Fortran 77, ac_cv_prog_g77,
 [cat > conftest.fpp <<EOF
@@ -302,6 +313,9 @@ else
   ac_cv_prog_g77=no
 fi])])
 
+
+dnl AC_PROG_CC_G
+dnl ------------
 AC_DEFUN(AC_PROG_CC_G,
 [AC_CACHE_CHECK(whether ${CC-cc} accepts -g, ac_cv_prog_cc_g,
 [echo 'void f(){}' > conftest.c
@@ -313,6 +327,9 @@ fi
 rm -f conftest*
 ])])
 
+
+dnl AC_PROG_CXX_G
+dnl -------------
 AC_DEFUN(AC_PROG_CXX_G,
 [AC_CACHE_CHECK(whether ${CXX-g++} accepts -g, ac_cv_prog_cxx_g,
 [echo 'void f(){}' > conftest.cc
@@ -324,10 +341,11 @@ fi
 rm -f conftest*
 ])])
 
+
+dnl AC_PROG_F77_G
+dnl -------------
 dnl Test whether the Fortran 77 compiler can accept the `-g' option to
 dnl enable debugging.
-dnl
-dnl AC_PROG_F77_G()
 AC_DEFUN(AC_PROG_F77_G,
 [AC_CACHE_CHECK(whether $F77 accepts -g, ac_cv_prog_f77_g,
 [cat > conftest.f << EOF
@@ -364,6 +382,8 @@ Autoconf TCGETA],
 fi
 ])
 
+dnl AC_PROG_CC_C_O
+dnl --------------
 AC_DEFUN(AC_PROG_CC_C_O,
 [if test "x$CC" != xcc; then
   AC_MSG_CHECKING(whether $CC and cc understand -c and -o together)
@@ -411,7 +431,8 @@ else
   AC_DEFINE(NO_MINUS_C_MINUS_O, 1,
             [Define if your C compiler doesn't accept -c and -o together.])
 fi
-])
+])dnl AC_PROG_CC_C_O
+
 
 dnl Test if the Fortran 77 compiler accepts the options `-c' and `-o'
 dnl simultaneously, and define `F77_NO_MINUS_C_MINUS_O' if it does not.
@@ -453,6 +474,8 @@ else
 fi
 ])
 
+dnl AC_PROG_MAKE_SET
+dnl ----------------
 dnl Define SET_MAKE to set ${MAKE} if make doesn't.
 AC_DEFUN(AC_PROG_MAKE_SET,
 [AC_MSG_CHECKING(whether ${MAKE-make} sets \${MAKE})
@@ -489,12 +512,14 @@ dnl Check for mawk first since it's generally faster.
 AC_DEFUN(AC_PROG_AWK,
 [AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])
 
+
 dnl AC_PROG_SED
 dnl -----------
 dnl Check whether the first sed in the path supports long scripts.
 dnl Set the variable $ac_cv_prog_sed_max_cmd to the maximum number
 dnl of commands to put in a sed script, `infinite' meaning a priori
 dnl infinite.
+dnl This macro is not documented on purpose.
 AC_DEFUN([AC_PROG_SED],
 [AC_CACHE_CHECK([for max sed script length], ac_cv_prog_sed_max_cmd,
 [echo >conftest.s "\
@@ -542,9 +567,13 @@ fi
 ])dnl
 ])dnl AC_PROG_BINSH
 
+
+dnl AC_PROG_YACC
+dnl ------------
 AC_DEFUN(AC_PROG_YACC,
 [AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])
 
+
 dnl AC_PROG_CPP
 dnl -----------
 AC_DEFUN(AC_PROG_CPP,
@@ -577,8 +606,11 @@ else
 fi
 AC_MSG_RESULT($CPP)
 AC_SUBST(CPP)dnl
-])
+])dnl AC_PROG_CPP
 
+
+dnl AC_PROG_CXXCPP
+dnl --------------
 AC_DEFUN(AC_PROG_CXXCPP,
 [AC_MSG_CHECKING(how to run the C++ preprocessor)
 if test -z "$CXXCPP"; then
@@ -599,8 +631,12 @@ AC_SUBST(CXXCPP)dnl
 dnl Require finding the C or C++ preprocessor, whichever is the
 dnl current language.
 AC_DEFUN(AC_REQUIRE_CPP,
-[ifelse(AC_LANG, C, [AC_REQUIRE([AC_PROG_CPP])], [AC_REQUIRE([AC_PROG_CXXCPP])])])
+[ifelse(AC_LANG,
+        C, [AC_REQUIRE([AC_PROG_CPP])],
+        [AC_REQUIRE([AC_PROG_CXXCPP])])])
 
+dnl AC_PROG_LEX
+dnl -----------
 AC_DEFUN(AC_PROG_LEX,
 [AC_CHECK_PROG(LEX, flex, flex, lex)
 if test -z "$LEXLIB"
@@ -613,7 +649,10 @@ then
 fi
 AC_SUBST(LEXLIB)])
 
+dnl AC_DECL_YYTEXT
+dnl --------------
 dnl Check if lex declares yytext as a char * by default, not a char[].
+dnl FIXME: Why the heck is there the following line?
 undefine([AC_DECL_YYTEXT])
 AC_DEFUN(AC_DECL_YYTEXT,
 [AC_REQUIRE_CPP()dnl
@@ -793,18 +832,6 @@ if test $ac_cv_header_stdc = yes; then
 fi
 ])
 
-AC_DEFUN(AC_UNISTD_H,
-[AC_HASBEEN([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])])dnl
-
-AC_DEFUN(AC_USG,
-[AC_HASBEEN([$0],
-  [; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])])
-
-dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
-dnl To avoid problems, don't check for gcc2 built-ins.
-AC_DEFUN(AC_MEMORY_H,
-[AC_HASBEEN([$0], [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])])
-
 AC_DEFUN(AC_HEADER_MAJOR,
 [AC_CACHE_CHECK(whether sys/types.h defines makedev,
   ac_cv_header_sys_types_h_makedev,
@@ -874,9 +901,6 @@ fi
 ])
 
 
-AC_DEFUN(AC_DIR_HEADER,
-[AC_HASBEEN([$0], [; instead use AC_HEADER_DIRENT])])
-
 AC_DEFUN(AC_HEADER_STAT,
 [AC_CACHE_CHECK(whether stat file-mode macros are broken,
   ac_cv_header_stat_broken,
@@ -953,6 +977,24 @@ if test $ac_cv_header_sys_wait_h = yes; then
 fi
 ])
 
+dnl A few hasbeen'd macros.
+
+AC_DEFUN(AC_UNISTD_H,
+[AC_HASBEEN([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])])
+
+AC_DEFUN(AC_USG,
+[AC_HASBEEN([$0],
+            [; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])])
+
+dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
+dnl To avoid problems, don't check for gcc2 built-ins.
+AC_DEFUN(AC_MEMORY_H,
+[AC_HASBEEN([$0],
+            [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])])
+
+AC_DEFUN(AC_DIR_HEADER,
+[AC_HASBEEN([$0], [; instead use AC_HEADER_DIRENT])])
+
 
 dnl ### Checks for typedefs
 
@@ -1021,6 +1063,8 @@ AC_DEFUN(AC_TYPE_OFF_T,
 AC_DEFUN(AC_TYPE_MODE_T,
 [AC_CHECK_TYPE(mode_t, int)])
 
+dnl AC_TYPE_SIGNAL
+dnl --------------
 dnl Note that identifiers starting with SIG are reserved by ANSI C.
 AC_DEFUN(AC_TYPE_SIGNAL,
 [AC_CACHE_CHECK([return type of signal handlers], ac_cv_type_signal,
@@ -1055,7 +1099,9 @@ AC_CACHE_CHECK(whether closedir returns void, ac_cv_func_closedir_void,
 [AC_TRY_RUN([#include <sys/types.h>
 #include <$ac_header_dirent>
 int closedir(); main() { exit(closedir(opendir(".")) != 0); }],
-  ac_cv_func_closedir_void=no, ac_cv_func_closedir_void=yes, ac_cv_func_closedir_void=yes)])
+  ac_cv_func_closedir_void=no,
+  ac_cv_func_closedir_void=yes,
+  ac_cv_func_closedir_void=yes)])
 if test $ac_cv_func_closedir_void = yes; then
   AC_DEFINE(CLOSEDIR_VOID, 1,
             [Define if the `closedir' function returns void instead of `int'.])
@@ -1076,6 +1122,8 @@ if test $ac_cv_func_fnmatch_works = yes; then
 fi
 ])
 
+dnl AC_FUNC_MMAP
+dnl ------------
 AC_DEFUN(AC_FUNC_MMAP,
 [AC_CHECK_HEADERS(unistd.h)
 AC_CHECK_FUNCS(getpagesize)
@@ -1222,8 +1270,11 @@ if test $ac_cv_func_mmap_fixed_mapped = yes; then
   AC_DEFINE(HAVE_MMAP, 1,
             [Define if you have a working `mmap' system call.])
 fi
-])
+])dnl AC_FUNC_MMAP
+
 
+dnl AC_FUNC_GETPGRP
+dnl ---------------
 AC_DEFUN(AC_FUNC_GETPGRP,
 [AC_CACHE_CHECK(whether getpgrp takes no argument, ac_cv_func_getpgrp_void,
 [AC_TRY_RUN([
@@ -1284,7 +1335,7 @@ if test $ac_cv_func_getpgrp_void = yes; then
   AC_DEFINE(GETPGRP_VOID, 1,
             [Define if the `getpgrp' function takes no argument.])
 fi
-])
+])dnl AC_FUNC_GETPGRP
 
 AC_DEFUN(AC_FUNC_SETPGRP,
 [AC_CACHE_CHECK(whether setpgrp takes no argument, ac_cv_func_setpgrp_void,
@@ -1316,7 +1367,7 @@ fi
 dnl Why the heck is that _doprnt does not define HAVE__DOPRNT???
 dnl That the logical name!  In addition, why doesn't it use
 dnl AC_CHECK_FUNCS(vprintf)?  Because old Autoconf uses sh for loops.
-dnl FIXME: To be changed in Autoconf 3.
+dnl FIXME: To be changed in Autoconf 3?
 AC_DEFUN(AC_FUNC_VPRINTF,
 [AC_CHECK_FUNC(vprintf,
                AC_DEFINE(HAVE_VPRINTF, 1,
@@ -1533,8 +1584,10 @@ if test $ac_cv_os_cray = yes; then
 for ac_func in _getb67 GETB67 getb67; do
   AC_CHECK_FUNC($ac_func,
                 [AC_DEFINE_UNQUOTED(CRAY_STACKSEG_END, $ac_func,
-                [Define to one of _getb67, GETB67, getb67 for Cray-2 and Cray-YMP systems.
-   This function is required for alloca.c support on those systems.])
+                                    [Define to one of _getb67, GETB67, getb67
+                                     for Cray-2 and Cray-YMP systems.
+                                     This function is required for alloca.c
+                                     support on those systems.])
   break])
 done
 fi
@@ -1968,11 +2021,11 @@ extern select ($ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_sel
   ac_cv_func_select_arg5='struct timeval *'
  fi
  AC_MSG_RESULT([$ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_select_arg5])
- AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG1,$ac_cv_func_select_arg1,
+ AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG1, $ac_cv_func_select_arg1,
                     [Define to the type of arg1 for `select'.])
- AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234,($ac_cv_func_select_arg234),
+ AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234, ($ac_cv_func_select_arg234),
                     [Define to the type of args 2, 3 and 4 for `select'.])
- AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5,($ac_cv_func_select_arg5),
+ AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5, ($ac_cv_func_select_arg5),
                     [Define to the type of arg5 for `select'.])
 ])
 
diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4
index 2f2f79f5..bd623c0c 100644
--- a/lib/autoconf/specific.m4
+++ b/lib/autoconf/specific.m4
@@ -175,7 +175,8 @@ dnl
 dnl AC_PROG_F77()
 AC_DEFUN(AC_PROG_F77,
 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
-AC_CHECK_PROGS(F77, ifelse([$1], , [g77 f77 xlf cf77 fl32 fort77 f90 xlf90 f2c], [$1]))
+AC_CHECK_PROGS(F77,
+               m4_default([$1], [g77 f77 xlf cf77 fl32 fort77 f90 xlf90 f2c]))
 
 AC_PROG_F77_WORKS
 AC_PROG_F77_GNU
@@ -202,11 +203,14 @@ else
 fi
 ])
 
+dnl AC_PROG_CC_WORKS
+dnl ----------------
 AC_DEFUN(AC_PROG_CC_WORKS,
 [AC_MSG_CHECKING([whether the C compiler ($CC $CFLAGS $CPPFLAGS $LDFLAGS) works])
 AC_LANG_SAVE
 AC_LANG_C
-AC_TRY_COMPILER([main(){return(0);}], ac_cv_prog_cc_works, ac_cv_prog_cc_cross)
+AC_TRY_COMPILER([int main(){return(0);}],
+                ac_cv_prog_cc_works, ac_cv_prog_cc_cross)
 AC_LANG_RESTORE
 AC_MSG_RESULT($ac_cv_prog_cc_works)
 if test $ac_cv_prog_cc_works = no; then
@@ -217,11 +221,14 @@ AC_MSG_RESULT($ac_cv_prog_cc_cross)
 cross_compiling=$ac_cv_prog_cc_cross
 ])
 
+dnl AC_PROG_CXX_WORKS
+dnl -----------------
 AC_DEFUN(AC_PROG_CXX_WORKS,
 [AC_MSG_CHECKING([whether the C++ compiler ($CXX $CXXFLAGS $CPPFLAGS $LDFLAGS) works])
 AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
-AC_TRY_COMPILER([int main(){return(0);}], ac_cv_prog_cxx_works, ac_cv_prog_cxx_cross)
+AC_TRY_COMPILER([int main(){return(0);}],
+                ac_cv_prog_cxx_works, ac_cv_prog_cxx_cross)
 AC_LANG_RESTORE
 AC_MSG_RESULT($ac_cv_prog_cxx_works)
 if test $ac_cv_prog_cxx_works = no; then
@@ -232,12 +239,12 @@ AC_MSG_RESULT($ac_cv_prog_cxx_cross)
 cross_compiling=$ac_cv_prog_cxx_cross
 ])
 
+dnl AC_PROG_F77_WORKS
+dnl -----------------
 dnl Test whether the Fortran 77 compiler can compile and link a trivial
 dnl Fortran program.  Also, test whether the Fortran 77 compiler is a
 dnl cross-compiler (which may realistically be the case if the Fortran
 dnl compiler is `g77').
-dnl
-dnl AC_PROG_F77_WORKS()
 AC_DEFUN(AC_PROG_F77_WORKS,
 [AC_MSG_CHECKING([whether the Fortran 77 compiler ($F77 $FFLAGS $LDFLAGS) works])
 AC_LANG_SAVE
@@ -256,6 +263,8 @@ AC_MSG_RESULT($ac_cv_prog_f77_cross)
 cross_compiling=$ac_cv_prog_f77_cross
 ])
 
+dnl AC_PROG_CC_GNU
+dnl --------------
 AC_DEFUN(AC_PROG_CC_GNU,
 [AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc,
 [dnl The semicolon is to pacify NeXT's syntax-checking cpp.
@@ -270,6 +279,8 @@ else
   ac_cv_prog_gcc=no
 fi])])
 
+dnl AC_PROG_CXX_GNU
+dnl ---------------
 AC_DEFUN(AC_PROG_CXX_GNU,
 [AC_CACHE_CHECK(whether we are using GNU C++, ac_cv_prog_gxx,
 [dnl The semicolon is to pacify NeXT's syntax-checking cpp.
@@ -284,11 +295,11 @@ else
   ac_cv_prog_gxx=no
 fi])])
 
+dnl AC_PROG_F77_GNU
+dnl ---------------
 dnl Test whether for Fortran 77 compiler is `g77' (the GNU Fortran 77
 dnl Compiler).  This test depends on whether the Fortran 77 compiler can
 dnl do CPP pre-processing.
-dnl
-dnl AC_PROG_F77_GNU()
 AC_DEFUN(AC_PROG_F77_GNU,
 [AC_CACHE_CHECK(whether we are using GNU Fortran 77, ac_cv_prog_g77,
 [cat > conftest.fpp <<EOF
@@ -302,6 +313,9 @@ else
   ac_cv_prog_g77=no
 fi])])
 
+
+dnl AC_PROG_CC_G
+dnl ------------
 AC_DEFUN(AC_PROG_CC_G,
 [AC_CACHE_CHECK(whether ${CC-cc} accepts -g, ac_cv_prog_cc_g,
 [echo 'void f(){}' > conftest.c
@@ -313,6 +327,9 @@ fi
 rm -f conftest*
 ])])
 
+
+dnl AC_PROG_CXX_G
+dnl -------------
 AC_DEFUN(AC_PROG_CXX_G,
 [AC_CACHE_CHECK(whether ${CXX-g++} accepts -g, ac_cv_prog_cxx_g,
 [echo 'void f(){}' > conftest.cc
@@ -324,10 +341,11 @@ fi
 rm -f conftest*
 ])])
 
+
+dnl AC_PROG_F77_G
+dnl -------------
 dnl Test whether the Fortran 77 compiler can accept the `-g' option to
 dnl enable debugging.
-dnl
-dnl AC_PROG_F77_G()
 AC_DEFUN(AC_PROG_F77_G,
 [AC_CACHE_CHECK(whether $F77 accepts -g, ac_cv_prog_f77_g,
 [cat > conftest.f << EOF
@@ -364,6 +382,8 @@ Autoconf TCGETA],
 fi
 ])
 
+dnl AC_PROG_CC_C_O
+dnl --------------
 AC_DEFUN(AC_PROG_CC_C_O,
 [if test "x$CC" != xcc; then
   AC_MSG_CHECKING(whether $CC and cc understand -c and -o together)
@@ -411,7 +431,8 @@ else
   AC_DEFINE(NO_MINUS_C_MINUS_O, 1,
             [Define if your C compiler doesn't accept -c and -o together.])
 fi
-])
+])dnl AC_PROG_CC_C_O
+
 
 dnl Test if the Fortran 77 compiler accepts the options `-c' and `-o'
 dnl simultaneously, and define `F77_NO_MINUS_C_MINUS_O' if it does not.
@@ -453,6 +474,8 @@ else
 fi
 ])
 
+dnl AC_PROG_MAKE_SET
+dnl ----------------
 dnl Define SET_MAKE to set ${MAKE} if make doesn't.
 AC_DEFUN(AC_PROG_MAKE_SET,
 [AC_MSG_CHECKING(whether ${MAKE-make} sets \${MAKE})
@@ -489,12 +512,14 @@ dnl Check for mawk first since it's generally faster.
 AC_DEFUN(AC_PROG_AWK,
 [AC_CHECK_PROGS(AWK, mawk gawk nawk awk, )])
 
+
 dnl AC_PROG_SED
 dnl -----------
 dnl Check whether the first sed in the path supports long scripts.
 dnl Set the variable $ac_cv_prog_sed_max_cmd to the maximum number
 dnl of commands to put in a sed script, `infinite' meaning a priori
 dnl infinite.
+dnl This macro is not documented on purpose.
 AC_DEFUN([AC_PROG_SED],
 [AC_CACHE_CHECK([for max sed script length], ac_cv_prog_sed_max_cmd,
 [echo >conftest.s "\
@@ -542,9 +567,13 @@ fi
 ])dnl
 ])dnl AC_PROG_BINSH
 
+
+dnl AC_PROG_YACC
+dnl ------------
 AC_DEFUN(AC_PROG_YACC,
 [AC_CHECK_PROGS(YACC, 'bison -y' byacc, yacc)])
 
+
 dnl AC_PROG_CPP
 dnl -----------
 AC_DEFUN(AC_PROG_CPP,
@@ -577,8 +606,11 @@ else
 fi
 AC_MSG_RESULT($CPP)
 AC_SUBST(CPP)dnl
-])
+])dnl AC_PROG_CPP
 
+
+dnl AC_PROG_CXXCPP
+dnl --------------
 AC_DEFUN(AC_PROG_CXXCPP,
 [AC_MSG_CHECKING(how to run the C++ preprocessor)
 if test -z "$CXXCPP"; then
@@ -599,8 +631,12 @@ AC_SUBST(CXXCPP)dnl
 dnl Require finding the C or C++ preprocessor, whichever is the
 dnl current language.
 AC_DEFUN(AC_REQUIRE_CPP,
-[ifelse(AC_LANG, C, [AC_REQUIRE([AC_PROG_CPP])], [AC_REQUIRE([AC_PROG_CXXCPP])])])
+[ifelse(AC_LANG,
+        C, [AC_REQUIRE([AC_PROG_CPP])],
+        [AC_REQUIRE([AC_PROG_CXXCPP])])])
 
+dnl AC_PROG_LEX
+dnl -----------
 AC_DEFUN(AC_PROG_LEX,
 [AC_CHECK_PROG(LEX, flex, flex, lex)
 if test -z "$LEXLIB"
@@ -613,7 +649,10 @@ then
 fi
 AC_SUBST(LEXLIB)])
 
+dnl AC_DECL_YYTEXT
+dnl --------------
 dnl Check if lex declares yytext as a char * by default, not a char[].
+dnl FIXME: Why the heck is there the following line?
 undefine([AC_DECL_YYTEXT])
 AC_DEFUN(AC_DECL_YYTEXT,
 [AC_REQUIRE_CPP()dnl
@@ -793,18 +832,6 @@ if test $ac_cv_header_stdc = yes; then
 fi
 ])
 
-AC_DEFUN(AC_UNISTD_H,
-[AC_HASBEEN([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])])dnl
-
-AC_DEFUN(AC_USG,
-[AC_HASBEEN([$0],
-  [; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])])
-
-dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
-dnl To avoid problems, don't check for gcc2 built-ins.
-AC_DEFUN(AC_MEMORY_H,
-[AC_HASBEEN([$0], [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])])
-
 AC_DEFUN(AC_HEADER_MAJOR,
 [AC_CACHE_CHECK(whether sys/types.h defines makedev,
   ac_cv_header_sys_types_h_makedev,
@@ -874,9 +901,6 @@ fi
 ])
 
 
-AC_DEFUN(AC_DIR_HEADER,
-[AC_HASBEEN([$0], [; instead use AC_HEADER_DIRENT])])
-
 AC_DEFUN(AC_HEADER_STAT,
 [AC_CACHE_CHECK(whether stat file-mode macros are broken,
   ac_cv_header_stat_broken,
@@ -953,6 +977,24 @@ if test $ac_cv_header_sys_wait_h = yes; then
 fi
 ])
 
+dnl A few hasbeen'd macros.
+
+AC_DEFUN(AC_UNISTD_H,
+[AC_HASBEEN([$0], [; instead use AC_CHECK_HEADERS(unistd.h)])])
+
+AC_DEFUN(AC_USG,
+[AC_HASBEEN([$0],
+            [; instead use AC_CHECK_HEADERS(string.h) and HAVE_STRING_H])])
+
+dnl If memchr and the like aren't declared in <string.h>, include <memory.h>.
+dnl To avoid problems, don't check for gcc2 built-ins.
+AC_DEFUN(AC_MEMORY_H,
+[AC_HASBEEN([$0],
+            [; instead use AC_CHECK_HEADERS(memory.h) and HAVE_MEMORY_H])])
+
+AC_DEFUN(AC_DIR_HEADER,
+[AC_HASBEEN([$0], [; instead use AC_HEADER_DIRENT])])
+
 
 dnl ### Checks for typedefs
 
@@ -1021,6 +1063,8 @@ AC_DEFUN(AC_TYPE_OFF_T,
 AC_DEFUN(AC_TYPE_MODE_T,
 [AC_CHECK_TYPE(mode_t, int)])
 
+dnl AC_TYPE_SIGNAL
+dnl --------------
 dnl Note that identifiers starting with SIG are reserved by ANSI C.
 AC_DEFUN(AC_TYPE_SIGNAL,
 [AC_CACHE_CHECK([return type of signal handlers], ac_cv_type_signal,
@@ -1055,7 +1099,9 @@ AC_CACHE_CHECK(whether closedir returns void, ac_cv_func_closedir_void,
 [AC_TRY_RUN([#include <sys/types.h>
 #include <$ac_header_dirent>
 int closedir(); main() { exit(closedir(opendir(".")) != 0); }],
-  ac_cv_func_closedir_void=no, ac_cv_func_closedir_void=yes, ac_cv_func_closedir_void=yes)])
+  ac_cv_func_closedir_void=no,
+  ac_cv_func_closedir_void=yes,
+  ac_cv_func_closedir_void=yes)])
 if test $ac_cv_func_closedir_void = yes; then
   AC_DEFINE(CLOSEDIR_VOID, 1,
             [Define if the `closedir' function returns void instead of `int'.])
@@ -1076,6 +1122,8 @@ if test $ac_cv_func_fnmatch_works = yes; then
 fi
 ])
 
+dnl AC_FUNC_MMAP
+dnl ------------
 AC_DEFUN(AC_FUNC_MMAP,
 [AC_CHECK_HEADERS(unistd.h)
 AC_CHECK_FUNCS(getpagesize)
@@ -1222,8 +1270,11 @@ if test $ac_cv_func_mmap_fixed_mapped = yes; then
   AC_DEFINE(HAVE_MMAP, 1,
             [Define if you have a working `mmap' system call.])
 fi
-])
+])dnl AC_FUNC_MMAP
+
 
+dnl AC_FUNC_GETPGRP
+dnl ---------------
 AC_DEFUN(AC_FUNC_GETPGRP,
 [AC_CACHE_CHECK(whether getpgrp takes no argument, ac_cv_func_getpgrp_void,
 [AC_TRY_RUN([
@@ -1284,7 +1335,7 @@ if test $ac_cv_func_getpgrp_void = yes; then
   AC_DEFINE(GETPGRP_VOID, 1,
             [Define if the `getpgrp' function takes no argument.])
 fi
-])
+])dnl AC_FUNC_GETPGRP
 
 AC_DEFUN(AC_FUNC_SETPGRP,
 [AC_CACHE_CHECK(whether setpgrp takes no argument, ac_cv_func_setpgrp_void,
@@ -1316,7 +1367,7 @@ fi
 dnl Why the heck is that _doprnt does not define HAVE__DOPRNT???
 dnl That the logical name!  In addition, why doesn't it use
 dnl AC_CHECK_FUNCS(vprintf)?  Because old Autoconf uses sh for loops.
-dnl FIXME: To be changed in Autoconf 3.
+dnl FIXME: To be changed in Autoconf 3?
 AC_DEFUN(AC_FUNC_VPRINTF,
 [AC_CHECK_FUNC(vprintf,
                AC_DEFINE(HAVE_VPRINTF, 1,
@@ -1533,8 +1584,10 @@ if test $ac_cv_os_cray = yes; then
 for ac_func in _getb67 GETB67 getb67; do
   AC_CHECK_FUNC($ac_func,
                 [AC_DEFINE_UNQUOTED(CRAY_STACKSEG_END, $ac_func,
-                [Define to one of _getb67, GETB67, getb67 for Cray-2 and Cray-YMP systems.
-   This function is required for alloca.c support on those systems.])
+                                    [Define to one of _getb67, GETB67, getb67
+                                     for Cray-2 and Cray-YMP systems.
+                                     This function is required for alloca.c
+                                     support on those systems.])
   break])
 done
 fi
@@ -1968,11 +2021,11 @@ extern select ($ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_sel
   ac_cv_func_select_arg5='struct timeval *'
  fi
  AC_MSG_RESULT([$ac_cv_func_select_arg1,$ac_cv_func_select_arg234,$ac_cv_func_select_arg5])
- AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG1,$ac_cv_func_select_arg1,
+ AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG1, $ac_cv_func_select_arg1,
                     [Define to the type of arg1 for `select'.])
- AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234,($ac_cv_func_select_arg234),
+ AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG234, ($ac_cv_func_select_arg234),
                     [Define to the type of args 2, 3 and 4 for `select'.])
- AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5,($ac_cv_func_select_arg5),
+ AC_DEFINE_UNQUOTED(SELECT_TYPE_ARG5, ($ac_cv_func_select_arg5),
                     [Define to the type of arg5 for `select'.])
 ])