configure: add --without-api-docs option

Add option to explicitly disable API man page build even if doxygen
binary is available. --without-docs also implies not building API
manpage.

This change intended to add more distinctness into build system and
allow user not to build unwanted man pages.

diff --git a/configure b/configure
index ae0a02709e2d611197b1a9903ede242d95897183..fa4c5b5ee3d3dd3051d31190edab142fb87f3f1a 100755 (executable)
--- a/configure
+++ b/configure
@@ -68,6 +68,7 @@ PYTHON=${PYTHON:-}
 PREFIX=/usr/local
 LIBDIR=
 WITH_DOCS=1
+WITH_API_DOCS=1
 WITH_EMACS=1
 WITH_BASH=1
 WITH_RUBY=1
@@ -137,7 +138,8 @@ Some features can be disabled (--with-feature=no is equivalent to
 --without-feature) :
 
        --without-bash-completion       Do not install bash completions files
-       --without-docs                  Do not install documentation and man pages
+       --without-docs                  Do not install documentation
+       --without-api-docs              Do not install API man page
        --without-emacs                 Do not install lisp file
        --without-ruby                  Do not install ruby bindings
        --without-zsh-completion        Do not install zsh completions files
@@ -184,11 +186,21 @@ for option; do
     elif [ "${option%%=*}" = '--with-docs' ]; then
        if [ "${option#*=}" = 'no' ]; then
            WITH_DOCS=0
+           WITH_API_DOCS=0
        else
            WITH_DOCS=1
        fi
     elif [ "${option}" = '--without-docs' ] ; then
        WITH_DOCS=0
+       WITH_API_DOCS=0
+    elif [ "${option%%=*}" = '--with-api-docs' ]; then
+       if [ "${option#*=}" = 'no' ]; then
+           WITH_API_DOCS=0
+       else
+           WITH_API_DOCS=1
+       fi
+    elif [ "${option}" = '--without-api-docs' ] ; then
+       WITH_API_DOCS=0
     elif [ "${option%%=*}" = '--with-emacs' ]; then
        if [ "${option#*=}" = 'no' ]; then
            WITH_EMACS=0
@@ -557,7 +569,7 @@ else
 fi
 
 have_doxygen=0
-if [ $WITH_DOCS = "1" ] ; then
+if [ $WITH_API_DOCS = "1" ] ; then
     printf "Checking if doxygen is available... "
     if command -v doxygen > /dev/null; then
        printf "Yes.\n"