Discover a POSIX shell for Solaris

Under Solaris, use ksh instead of `/bin/sh`.

This uses `$SHELL` as a POSIX shell, coupled with a `configure` check
that sets it correctly.

Note that the POSIX shell might end up being bash, so this actually
introduces more fragmentation than it reduces.

Taken from https://github.com/freedreno/mesa/blob/master/configure.ac

6 files changed, 16 insertions, 5 deletions

diff --git a/.gitignore b/.gitignore
index c039fa7..d7d26c6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,10 @@ depcomp
 debian/rcm
 debian/rcm.debhelper.log
 share/rcm.sh
+bin/lsrc
+bin/mkrc
+bin/rcup
+bin/rcdn
 *deb
 NEWS.md
 rcm-*.tar.gz
diff --git a/bin/lsrc b/bin/lsrc.in
index 9055eec..1402fec 100755
--- a/bin/lsrc
+++ b/bin/lsrc.in
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!@SHELL@
 
 : ${RCM_LIB:=$(dirname "$0")/../share/rcm}
 . "$RCM_LIB/rcm.sh"
diff --git a/bin/mkrc b/bin/mkrc.in
index 3d9b749..398996a 100755
--- a/bin/mkrc
+++ b/bin/mkrc.in
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!@SHELL@
 
 : ${RCM_LIB:=$(dirname "$0")/../share/rcm}
 . "$RCM_LIB/rcm.sh"
diff --git a/bin/rcdn b/bin/rcdn.in
index 2caa340..2ca6dae 100755
--- a/bin/rcdn
+++ b/bin/rcdn.in
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!@SHELL@
 
 : ${RCM_LIB:=$(dirname "$0")/../share/rcm}
 . "$RCM_LIB/rcm.sh"
diff --git a/bin/rcup b/bin/rcup.in
index b45157b..849a0f7 100755
--- a/bin/rcup
+++ b/bin/rcup.in
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!@SHELL@
 
 : ${RCM_LIB:=$(dirname "$0")/../share/rcm}
 . "$RCM_LIB/rcm.sh"
diff --git a/configure.ac b/configure.ac
index d938afc..4eb0b00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -6,6 +6,13 @@ AC_INIT(rcm, 1.2.1, mburns@thoughtbot.com)
 AM_INIT_AUTOMAKE
 
 # Checks for programs.
+case "$host_os" in
+solaris*)
+    AC_PATH_PROGS(POSIX_SHELL, [ksh93 ksh sh])
+    SHELL="$POSIX_SHELL"
+    ;;
+esac
+AC_SUBST([SHELL])
 
 # Checks for libraries.
 
@@ -16,4 +23,4 @@ AM_INIT_AUTOMAKE
 # Checks for library functions.
 
 AM_EXTRA_RECURSIVE_TARGETS([release_build_man_html release_push_man_html release_clean_man_html])
-AC_OUTPUT(Makefile bin/Makefile man/Makefile share/Makefile share/rcm.sh NEWS.md)
+AC_OUTPUT(Makefile bin/Makefile man/Makefile share/Makefile share/rcm.sh NEWS.md bin/lsrc bin/mkrc bin/rcdn bin/rcup)