configure: absolute path of perl

This can be used to set shebang lines during install.

diff --git a/configure b/configure
index 20961763ff36c33cc8a4d5022d32e76405e95336..b2200be08a03069957c76af3a59f3fbbffd360d6 100755 (executable)
--- a/configure
+++ b/configure
@@ -54,6 +54,7 @@ fi
 # Set several defaults (optionally specified by the user in
 # environment variables)
 BASH=${BASH:-bash}
+PERL=${PERL:-perl}
 CC=${CC:-cc}
 CXX=${CXX:-c++}
 CFLAGS=${CFLAGS:--g -O2}
@@ -568,6 +569,16 @@ else
     printf "No. (%s not found)\n" "${BASH}"
 fi
 
+printf "Checking for perl... "
+if command -v ${PERL} > /dev/null; then
+    have_perl=1
+    perl_absolute=$(command -v ${PERL})
+    printf "Yes (%s).\n" "$perl_absolute"
+else
+    have_perl=0
+    printf "No. (%s not found)\n" "${PERL}"
+fi
+
 printf "Checking for python... "
 have_python=0
 
@@ -1096,6 +1107,10 @@ emacsetcdir=${EMACSETCDIR}
 HAVE_BASH = ${have_bash}
 BASH_ABSOLUTE = ${bash_absolute}
 
+# Whether perl exists, and if so where
+HAVE_PERL = ${have_perl}
+PERL_ABSOLUTE = ${perl_absolute}
+
 # Whether there's an emacs binary available for byte-compiling
 HAVE_EMACS = ${have_emacs}
 
@@ -1281,6 +1296,10 @@ NOTMUCH_HAVE_MAN=$((have_sphinx))
 NOTMUCH_HAVE_BASH=${have_bash}
 NOTMUCH_BASH_ABSOLUTE=${bash_absolute}
 
+# Whether perl exists, and if so where
+NOTMUCH_HAVE_PERL=${have_perl}
+NOTMUCH_PERL_ABSOLUTE=${perl_absolute}
+
 # Name of python interpreter
 NOTMUCH_PYTHON=${python}