configure: rationalise error messages with meaningful texts

Currently, error messages just state the obvious: a required
component is required. While in some cases, there is not much
else to say, in some other cases we could tell much more.

For example, a missing libstdc++ means no static toolchain.

Also, format error and warning messages in a similar fashion,
with a {error,warning} intro, followed by the message specified
by the caller.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

1 files changed, 4 insertions, 5 deletions

diff --git a/configure b/configure
index d0c032a..55638bb 100755
--- a/configure
+++ b/configure
@@ -215,9 +215,8 @@ has_or_abort() {
     local var ver err kconfig
 
     if ! check_for "$@"; then
+        printf " * A mandatory dependency is missing, or version mis-match\n"
         printf " * ${err:-${prog}${inc}${lib}: none found}\n"
-        printf " * Either you are missing entirely the needed tool,\n"
-        printf " * or the version you have is too old.\n"
         if [ -n "${var}" ]; then
             printf " * --> You can give the path to this tool using: --with-${var}=PATH\n"
         fi
@@ -243,7 +242,7 @@ has_or_warn() {
     local var ver err kconfig
 
     if ! check_for "$@"; then
-        printf " * optional dependency is missing, some features will be disabled\n"
+        printf " * An optional dependency is missing, some features will be disabled\n"
         printf "${err:+ * ${err}\n}"
         if [ -n "${var}" ]; then
             printf " * --> You can give the path to this tool using: --with-${var}=PATH\n"
@@ -428,14 +427,14 @@ ncurses_libs="$( for l in ncursesw ncurses curses; do   \
                  done                                   \
                )"
 has_or_abort lib="${ncurses_libs}"                  \
-             err="'ncurses' library was not found"
+             err="The 'ncurses' library is needed fo the menuconfig frontend"
 
 stdcxx_libs="$( for x in so dylib a; do \
                    printf "libstdc++.$x "; \
                done \
              )"
 has_or_abort lib="${stdcxx_libs}" \
-             err="'libstdc++' shared library was not found"
+             err="The 'libstdc++' library is needed to build gcc"
 
 # Yes, we may be checking twice for libstdc++.a
 # The first is because we need one instance of libstdc++ (shared or static)