liburing: specifying --prefix to configure script was ineffective, fix.

The configure script used the default value of the prefix variable
(/usr) to determine the includedir etc. *before* parsing the command
line to determine if the user specified a prefix. This made configure
--prefix ineffective.

Fix.

Tested with configure --help, configure --prefix, configure --prefix
--includedir

Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 48 insertions, 40 deletions

diff --git a/configure b/configure
index 19c2b54..0b185b8 100755
--- a/configure
+++ b/configure
@@ -10,10 +10,54 @@ else
 fi
 
 cc=gcc
-prefix=/usr
-includedir="$prefix/include"
-libdir="$prefix/lib"
-mandir="$prefix/man"
+
+for opt do
+  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
+  case "$opt" in
+  --help|-h) show_help=yes
+  ;;
+  --prefix=*) prefix="$optarg"
+  ;;
+  --includedir=*) includedir="$optarg"
+  ;;
+  --libdir=*) libdir="$optarg"
+  ;;
+  --mandir=*) mandir="$optarg"
+  ;;
+  *)
+    echo "ERROR: unkown option $opt"
+    echo "Try '$0 --help' for more information"
+    exit 1
+  ;;
+  esac
+done
+
+if test -z "$prefix"; then
+  prefix=/usr
+fi
+if test -z "$includedir"; then
+  includedir="$prefix/include"
+fi
+if test -z "$libdir"; then
+  libdir="$prefix/lib"
+fi
+if test -z "$mandir"; then
+  mandir="$prefix/man"
+fi
+
+if test "$show_help" = "yes"; then
+cat <<EOF
+
+Usage: configure [options]
+Options: [defaults in brackets after descriptions]
+  --help                   print this message
+  --prefix=PATH            install in PATH [$prefix]
+  --includedir=PATH        install headers in PATH [$includedir]
+  --libdir=PATH            install libraries in PATH [$libdir]
+  --mandir=PATH            install man pages in PATH [$mandir]
+EOF
+exit 0
+fi
 
 TMPC="${TMPDIR1}/fio-conf-${RANDOM}-$$-${RANDOM}.c"
 TMPC2="${TMPDIR1}/fio-conf-${RANDOM}-$$-${RANDOM}-2.c"
@@ -115,42 +159,6 @@ print_and_output_mak() {
   print_config "$1" "$2"
   output_mak "$1" "$2"
 }
-
-for opt do
-  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
-  case "$opt" in
-  --help|-h) show_help=yes
-  ;;
-  --prefix=*) prefix="$optarg"
-  ;;
-  --includedir=*) includedir="$optarg"
-  ;;
-  --libdir=*) libdir="$optarg"
-  ;;
-  --mandir=*) mandir="$optarg"
-  ;;
-  *)
-    echo "ERROR: unkown option $opt"
-    echo "Try '$0 --help' for more information"
-    exit 1
-  ;;
-  esac
-done
-
-if test "$show_help" = "yes"; then
-cat <<EOF
-
-Usage: configure [options]
-Options: [defaults in brackets after descriptions]
-  --help                   print this message
-  --prefix=PATH            install in PATH [$prefix]
-  --includedir=PATH        install headers in PATH [$includedir]
-  --libdir=PATH            install libraries in PATH [$libdir]
-  --mandir=PATH            install man pages in PATH [$mandir]
-EOF
-exit 0
-fi
-
 print_and_output_mak "prefix" "$prefix"
 print_and_output_mak "includedir" "$includedir"
 print_and_output_mak "libdir" "$libdir"