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configure: add has_or_warn

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By popular request, add a function to only warn on missing stuff.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
This commit is contained in:
Yann E. MORIN" 2011-05-26 18:33:53 +02:00
parent 94314fce7c
commit 7aa57aa228
1 changed files with 18 additions and 0 deletions
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18
configure vendored
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@ -96,6 +96,7 @@ add_to_var_list() {
# the error message to print if tool is missing
# optional, defaults to: '${prog}: none found'
# eg: err="'bash' 3.x or above was not found"
# Note: err may be printed by caller, not us
check_for() {
local val
local item
@ -208,6 +209,23 @@ has_or_abort() {
fi
}
# This function checks for a tool, and warns if not found
# See check_for(), above, for how to call has_or_abort
# Note: if err is not set, then no error message is printed
has_or_warn() {
# We declare these 6 variables here, although they are
# set in check_for(), called below
local prog inc lib
local var ver err
if ! check_for "$@"; then
printf "${err:+${err}\n}"
if [ -n "${var}" ]; then
printf -- "--> You can give the path to this tool using: --with-${var}=PATH\n"
fi
fi
}
do_help() {
cat <<__EOF__
\`configure' configures crosstool-NG-${VERSION} to adapt to many kind of systems.