[gcc r13-4721] Subject: [committed, pushed] PR-107607 m2: Remove bdepend on realpath, cut and echo

[gcc r13-4721] Subject: [committed, pushed] PR-107607 m2: Remove bdepend on realpath, cut and echo

[Gaius Mulley]

https://gcc.gnu.org/g:85d0d2683b7b00b9ec77ef4dc6a4494df6c7f555

commit r13-4721-g85d0d2683b7b00b9ec77ef4dc6a4494df6c7f555
Author: Gaius Mulley <gaiusmod2@gmail.com>
Date:   Thu Dec 15 14:25:05 2022 +0000

    Subject: [committed, pushed] PR-107607 m2: Remove bdepend on realpath, cut and echo
    
    It can be replaced by a subshell'd cd just fine.
    (cd gcc/m2; autoconf-2.69)
    
    gcc/m2/ChangeLog:
    
            * configure.ac: Stop probing for realpath.
            * tools-src/calcpath: Break dependency on realpath, cut
            and echo.
            * configure: Rebuilt.
    
    Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>

Diff:
---
 gcc/m2/configure          | 47 -----------------------------------------------
 gcc/m2/configure.ac       |  5 -----
 gcc/m2/tools-src/calcpath | 34 ++++++++++++++++++----------------
 3 files changed, 18 insertions(+), 68 deletions(-)

diff --git a/gcc/m2/configure b/gcc/m2/configure
index db1ca3d1f9b..91768ab9c6f 100755
--- a/gcc/m2/configure
+++ b/gcc/m2/configure
@@ -630,7 +630,6 @@ CPPFLAGS
 LDFLAGS
 CFLAGS
 CC
-regex_realpath
 target_os
 target_vendor
 target_cpu
@@ -2235,52 +2234,6 @@ test -n "$target_alias" &&
     NONENONEs,x,x, &&
   program_prefix=${target_alias}-
 
-for ac_prog in realpath
-do
-  # Extract the first word of "$ac_prog", so it can be a program name with args.
-set dummy $ac_prog; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_regex_realpath+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$regex_realpath"; then
-  ac_cv_prog_regex_realpath="$regex_realpath" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_regex_realpath="$ac_prog"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-regex_realpath=$ac_cv_prog_regex_realpath
-if test -n "$regex_realpath"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $regex_realpath" >&5
-$as_echo "$regex_realpath" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-  test -n "$regex_realpath" && break
-done
-
-if test x$regex_realpath = "x" ; then
-    as_fn_error $? "realpath is required to build GNU Modula-2 (hint install coreutils)." "$LINENO" 5
-fi
-
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
diff --git a/gcc/m2/configure.ac b/gcc/m2/configure.ac
index 756e01c4321..5583af7f64c 100644
--- a/gcc/m2/configure.ac
+++ b/gcc/m2/configure.ac
@@ -24,11 +24,6 @@ AC_CANONICAL_BUILD
 AC_CANONICAL_HOST
 AC_CANONICAL_TARGET
 
-AC_CHECK_PROGS(regex_realpath, realpath)
-if test x$regex_realpath = "x" ; then
-    AC_MSG_ERROR([realpath is required to build GNU Modula-2 (hint install coreutils).])
-fi
-
 AC_CHECK_FUNCS([stpcpy])
 
 AC_CHECK_HEADERS(sys/types.h)
diff --git a/gcc/m2/tools-src/calcpath b/gcc/m2/tools-src/calcpath
index e0817704f64..05324513aa1 100755
--- a/gcc/m2/tools-src/calcpath
+++ b/gcc/m2/tools-src/calcpath
@@ -23,27 +23,29 @@
 
 
 Usage () {
-   echo "Usage: calcpath pathcomponent1 pathcomponent2 subdir"
-   echo -n "  if pathcomponent1 is relative then pathcomponent1/pathcomponet2/subdir is"
-   echo " returned"
-   echo "  otherwise pathcomponet2/subdir is returned"
-   echo "  the path is checked for legality in subdir."
+   cat<<EOF
+Usage: $0 pathcomponent1 pathcomponent2 subdir
+  if pathcomponent2 is relative then pathcomponent1/pathcompinent2/subdir is returned
+  otherwise pathcomponent2/subdir is returned
+  the path is checked for legality in subdir.
+EOF
 }
 
+die () {
+   printf "calcpath: error: %s\n" "$1" >&2
+   exit 1
+}
 
 if [ $# -eq 3 ]; then
-   if [ "$(echo $2 | cut -b 1)" = "." ] ; then
-       # relative path
-       the_path=$1/$2/$3
-   else
-       the_path=$2/$3
-   fi
-   cd $3
-   if realpath ${the_path} > /dev/null ; then
-       echo ${the_path}
+   case "$2" in
+      /*) the_path="$2/$3" ;;
+      *) the_path="$1/$2/$3" ;;
+   esac
+   cd "$3" || die "could not access $3"
+   if ( cd "$the_path" ); then
+      printf '%s\n' "${the_path}"
    else
-       echo "calcpath: error ${the_path} is not a valid path in subdirectory $3" 1>&2
-       exit 1
+      die "${the_path} is not a valid path in subdirectory $3"
    fi
 else
    Usage