Merge branch 'develop' into t/17066/work_around_mpmath_problem_with_hypergeometric___zeroes

* develop: (1353 commits)
  Updated Sage version to 6.5.beta5
  Trac 17579: move ManinSymbol class
  17539: more doctests
  trac #17227: small corrections for comment 21
  17539: fraction method of expression
  trac #17549: Link toward an explanation of absolute/relative
  trac #17227: small corrections for comment 18
  trac #17551: Typo
  Typo
  trac #17549: Review
  add doctest for integrals in trac #12628
  trac #17552: Introduced bliss patch and made the additional error checkings
  trac #17549: Review
  Don't ignore ring for numpy -> vector conversion
  trac #17549: Review
  trac #9855 correct optional keyword
  trac #9855 little polishing of doc
  trac_9855: fix support for project options in tachyon
  trac #17552: Added move of "kqueue.hh" header to local/include
  trac #17557: clean import + Set -> frozenset in bibd.py
  ...

Conflicts:
	src/sage/functions/hypergeometric.py

Author: rwst

COPYING.txt

@@ -54,7 +54,7 @@ gcc                         GPLv3+
 gd                          Custom (BSD-ish)
 gdmodule                    Custom (BSD-ish)
 genus2reduction             GPLv2+
-gfan                        GPLv2+
+gfan                        GPLv2 or GPLv3
 gf2x                        GPLv2+
 givaro                      CeCILL-B (BSD-ish)
 glpk                        GPLv3+
@@ -75,7 +75,6 @@ m4ri                        GPLv2+
 m4rie                       GPLv2+
 matplotlib                  Matplotlib License (BSD compatible, see below)
 maxima                      See below
-mercurial                   GPLv2+
 mpc                         LGPLv3+
 mpfi                        COPYING is GPLv2, source files state LGPLv2.1+
 mpfr                        LGPLv3+
@@ -89,6 +88,7 @@ pari                        GPLv2+
 patch                       GPLv2+
 pexpect                     Python License
 pillow                      Apache License 2.0
+pip                         MIT License
 pkgconf                     ISC License (equivalent to Simplified BSD)
 pkgconfig                   MIT License
 polybori                    GPLv2+

README.txt

@@ -64,7 +64,7 @@ QUICK INSTRUCTIONS TO BUILD FROM SOURCE
 
 The following steps briefly outline the process of building Sage from
 source. More detailed instructions, including how to build faster on
-multicore machines are contained later in this README and in the
+multicore machines, are contained later in this README and in the
 Installation Guide:
 
     http://www.sagemath.org/doc/installation

VERSION.txt

@@ -1 +1 @@
-Sage version 6.4.rc0, released 2014-10-30
+Sage version 6.5.beta5, released 2015-01-05

build/deps

@@ -79,6 +79,7 @@ all-sage: \
      $(INST)/$(PARI) \
      $(INST)/$(PEXPECT) \
      $(INST)/$(PILLOW) \
+     $(INST)/$(PIP) \
      $(INST)/$(PKGCONF) \
      $(INST)/$(PKGCONFIG) \
      $(INST)/$(POLYBORI) \
@@ -143,12 +144,9 @@ SAGERUNTIME = $(SCRIPTS) $(INST)/sage $(INST)/$(SAGENB) $(INST)/$(IPYTHON)
 ###############################################################################
 # Building the base system
 #
-# This consists of packages which are required for the Sage build system
-# but not for Sage itself.  Since nothing explicitly depends on these,
-# an update of these packages will not trigger a rebuild of every other
-# package during an upgrade, see #13415.
+# This consists of packages which are required for the Sage build system.
 ###############################################################################
-base: $(INST)/prereq $(INST)/$(BZIP2) $(INST)/$(PATCH)
+base: $(INST)/prereq $(INST)/$(BZIP2) $(INST)/$(PATCH) $(INST)/$(PKGCONF)
 
 $(INST)/prereq: ../configure
 	@cd ..; rm -f config.log; ln -s logs/pkgs/config.log config.log; \
@@ -175,10 +173,10 @@ $(INST)/$(BZIP2): $(INST)/prereq $(INST)/$(PKGCONF)
 # Building normal packages
 ###############################################################################
 
-$(INST)/$(ATLAS): $(INST)/$(PYTHON)
+$(INST)/$(ATLAS): | $(INST)/$(PYTHON)
 	+$(PIPE) "$(SAGE_SPKG) $(ATLAS) 2>&1" "tee -a $(SAGE_LOGS)/$(ATLAS).log"
 
-$(INST)/$(BOEHM_GC): $(INST)/$(PKGCONF)
+$(INST)/$(BOEHM_GC):
 	+$(PIPE) "$(SAGE_SPKG) $(BOEHM_GC) 2>&1" "tee -a $(SAGE_LOGS)/$(BOEHM_GC).log"
 
 $(INST)/$(BOOST_CROPPED):
@@ -190,7 +188,7 @@ $(INST)/$(CLIQUER):
 $(INST)/$(COMBINATORIAL_DESIGNS):
 	+$(PIPE) "$(SAGE_SPKG) $(COMBINATORIAL_DESIGNS) 2>&1" "tee -a $(SAGE_LOGS)/$(COMBINATORIAL_DESIGNS).log"
 
-$(INST)/$(NCURSES): $(INST)/$(PKGCONF)
+$(INST)/$(NCURSES):
 	+$(PIPE) "$(SAGE_SPKG) $(NCURSES) 2>&1" "tee -a $(SAGE_LOGS)/$(NCURSES).log"
 
 $(INST)/$(READLINE): $(INST)/$(NCURSES)
@@ -202,12 +200,12 @@ $(INST)/$(ICONV):
 $(INST)/$(DOCUTILS): $(INST)/$(PYTHON)
 	+$(PIPE) "$(SAGE_SPKG) $(DOCUTILS) 2>&1" "tee -a $(SAGE_LOGS)/$(DOCUTILS).log"
 
-$(INST)/$(ELLIPTIC_CURVES): $(INST)/$(PYTHON) $(INST)/$(SQLITE)
+$(INST)/$(ELLIPTIC_CURVES): | $(INST)/$(SQLITE) $(INST)/$(PYTHON)
 	+$(PIPE) "$(SAGE_SPKG) $(ELLIPTIC_CURVES) 2>&1" "tee -a $(SAGE_LOGS)/$(ELLIPTIC_CURVES).log"
 
 # CONWAY depends on depends on SAGERUNTIME because it runs Sage code to
 # generate a Sage object (.sobj).
-$(INST)/$(CONWAY): $(SAGERUNTIME)
+$(INST)/$(CONWAY): | $(SAGERUNTIME)
 	+$(PIPE) "$(SAGE_SPKG) $(CONWAY) 2>&1" "tee -a $(SAGE_LOGS)/$(CONWAY).log"
 
 $(INST)/$(GRAPHS):
@@ -216,8 +214,9 @@ $(INST)/$(GRAPHS):
 $(INST)/$(GLPK): $(INST)/$(MPIR) $(INST)/$(ZLIB)
 	+$(PIPE) "$(SAGE_SPKG) $(GLPK) 2>&1" "tee -a $(SAGE_LOGS)/$(GLPK).log"
 
-$(INST)/$(PYTHON): $(INST)/$(ZLIB) $(INST)/$(BZIP2) $(INST)/$(PKGCONF) \
-		   $(INST)/$(READLINE) $(INST)/$(SQLITE) $(INST)/$(LIBPNG)
+$(INST)/$(PYTHON): $(INST)/$(ZLIB) $(INST)/$(READLINE) \
+                   $(INST)/$(SQLITE) $(INST)/$(LIBPNG) \
+                   | $(INST)/$(BZIP2)
 	+$(PIPE) "$(SAGE_SPKG) $(PYTHON) 2>&1" "tee -a $(SAGE_LOGS)/$(PYTHON).log"
 
 $(INST)/$(MPIR): $(INST)/$(ICONV)
@@ -236,7 +235,7 @@ $(INST)/$(FPLLL): $(INST)/$(MPIR) $(INST)/$(MPFR)
 	+$(PIPE) "$(SAGE_SPKG) $(FPLLL) 2>&1" "tee -a $(SAGE_LOGS)/$(FPLLL).log"
 
 $(INST)/$(PARI): $(INST)/$(READLINE) $(INST)/$(MPIR) \
-    $(INST)/$(PARI_GALDATA) $(INST)/$(PARI_SEADATA_SMALL)
+    | $(INST)/$(PARI_GALDATA) $(INST)/$(PARI_SEADATA_SMALL)
 	+$(PIPE) "$(SAGE_SPKG) $(PARI) 2>&1" "tee -a $(SAGE_LOGS)/$(PARI).log"
 
 $(INST)/$(PARI_GALDATA):
@@ -245,6 +244,9 @@ $(INST)/$(PARI_GALDATA):
 $(INST)/$(PARI_SEADATA_SMALL):
 	+$(PIPE) "$(SAGE_SPKG) $(PARI_SEADATA_SMALL) 2>&1" "tee -a $(SAGE_LOGS)/$(PARI_SEADATA_SMALL).log"
 
+$(INST)/$(PIP): $(INST)/$(PYTHON) $(INST)/$(SETUPTOOLS)
+	+$(PIPE) "$(SAGE_SPKG) $(PIP) 2>&1" "tee -a $(SAGE_LOGS)/$(PIP).log"
+
 $(INST)/$(POLYBORI): $(INST)/$(PYTHON) $(INST)/$(IPYTHON) \
          $(INST)/$(SCONS) $(INST)/$(BOOST_CROPPED) \
          $(INST)/$(M4RI) $(INST)/$(GD)
@@ -330,9 +332,9 @@ $(INST)/$(SQLITE): $(INST)/$(READLINE)
 
 # To build SageTeX, you just need Python, but to test (SAGE_CHECK=yes)
 # SageTeX, you actually need to run Sage, produce plots,...
-$(INST)/$(SAGETEX): $(INST)/$(PYTHON) \
-                    $(SAGERUNTIME) $(INST)/$(MAXIMA) $(INST)/$(SCIPY) \
-                    $(INST)/$(MATPLOTLIB) $(INST)/$(PILLOW) $(INST)/$(TACHYON)
+$(INST)/$(SAGETEX): $(INST)/$(PYTHON) $(INST)/$(MAXIMA) $(INST)/$(SCIPY) \
+                    $(INST)/$(MATPLOTLIB) $(INST)/$(PILLOW) $(INST)/$(TACHYON) \
+                    | $(SAGERUNTIME)
 	+$(PIPE) "$(SAGE_SPKG) $(SAGETEX) 2>&1" "tee -a $(SAGE_LOGS)/$(SAGETEX).log"
 
 $(INST)/$(SETUPTOOLS): $(INST)/$(PYTHON)
@@ -357,7 +359,7 @@ $(INST)/$(ZEROMQ):
 $(INST)/$(ZLIB):
 	+$(PIPE) "$(SAGE_SPKG) $(ZLIB) 2>&1" "tee -a $(SAGE_LOGS)/$(ZLIB).log"
 
-$(INST)/$(JMOL): $(INST)/$(SAGENB)
+$(INST)/$(JMOL): | $(INST)/$(SAGENB)
 	+$(PIPE) "$(SAGE_SPKG) $(JMOL) 2>&1" "tee -a $(SAGE_LOGS)/$(JMOL).log"
 
 $(INST)/$(FREETYPE): $(INST)/$(LIBPNG)
@@ -382,10 +384,10 @@ $(INST)/$(TORNADO): $(INST)/$(PYTHON) $(INST)/$(SETUPTOOLS)
 	+$(PIPE) "$(SAGE_SPKG) $(TORNADO) 2>&1" "tee -a $(SAGE_LOGS)/$(TORNADO).log"
 
 $(INST)/$(MATPLOTLIB): $(INST)/$(PYTHON) $(INST)/$(NUMPY) \
-		       $(INST)/$(FREETYPE) $(INST)/$(LIBPNG) \
-		       $(INST)/$(GDMODULE) $(INST)/$(DATEUTIL) \
-		       $(INST)/$(PKGCONF) $(INST)/$(PYPARSING) \
-		       $(INST)/$(SETUPTOOLS) $(INST)/$(TORNADO) $(INST)/$(SIX)
+                       $(INST)/$(FREETYPE) $(INST)/$(LIBPNG) \
+                       $(INST)/$(GDMODULE) $(INST)/$(DATEUTIL) \
+                       $(INST)/$(PYPARSING) $(INST)/$(SETUPTOOLS) \
+                       $(INST)/$(TORNADO) $(INST)/$(SIX)
 	+$(PIPE) "$(SAGE_SPKG) $(MATPLOTLIB) 2>&1" "tee -a $(SAGE_LOGS)/$(MATPLOTLIB).log"
 
 $(INST)/$(CDDLIB): $(INST)/$(MPIR)
@@ -409,7 +411,7 @@ $(INST)/$(ECL): $(INST)/$(MPIR) $(INST)/$(READLINE) $(INST)/$(BOEHM_GC)
 $(INST)/$(MAXIMA): $(INST)/$(ECL)
 	+$(PIPE) "$(SAGE_SPKG) $(MAXIMA) 2>&1" "tee -a $(SAGE_LOGS)/$(MAXIMA).log"
 
-$(INST)/$(R): $(INST)/$(ATLAS) $(INST)/$(ICONV) $(INST)/$(READLINE) $(INST)/$(PKGCONF)
+$(INST)/$(R): $(INST)/$(ATLAS) $(INST)/$(ICONV) $(INST)/$(READLINE)
 	+$(PIPE) "$(SAGE_SPKG) $(R) 2>&1" "tee -a $(SAGE_LOGS)/$(R).log"
 
 $(INST)/$(RPY): $(INST)/$(PYTHON) $(INST)/$(R)
@@ -430,15 +432,15 @@ $(INST)/$(FLINT): $(INST)/$(MPIR) $(INST)/$(MPFR) $(INST)/$(NTL)
 $(INST)/$(ECLIB): $(INST)/$(PARI) $(INST)/$(NTL) $(INST)/$(FLINT)
 	+$(PIPE) "$(SAGE_SPKG) $(ECLIB) 2>&1" "tee -a $(SAGE_LOGS)/$(ECLIB).log"
 
-$(INST)/$(M4RI): $(INST)/$(LIBPNG) $(INST)/$(PKGCONF)
+$(INST)/$(M4RI): $(INST)/$(LIBPNG)
 	+$(PIPE) "$(SAGE_SPKG) $(M4RI) 2>&1" "tee -a $(SAGE_LOGS)/$(M4RI).log"
 
 $(INST)/$(M4RIE): $(INST)/$(M4RI) $(INST)/$(GIVARO) $(INST)/$(NTL)
 	+$(PIPE) "$(SAGE_SPKG) $(M4RIE) 2>&1" "tee -a $(SAGE_LOGS)/$(M4RIE).log"
 
 # zn_poly really does depend on Python, despite this is far from obvious.
 # The 'configure' script in zn_poly calls Python to make a 'makefile'.
-$(INST)/$(ZNPOLY): $(INST)/$(MPIR) $(INST)/$(PYTHON)
+$(INST)/$(ZNPOLY): $(INST)/$(MPIR) | $(INST)/$(PYTHON)
 	+$(PIPE) "$(SAGE_SPKG) $(ZNPOLY) 2>&1" "tee -a $(SAGE_LOGS)/$(ZNPOLY).log"
 
 $(INST)/$(SAGENB): $(INST)/$(PYTHON) $(INST)/$(SETUPTOOLS) $(INST)/$(PEXPECT) \
@@ -533,16 +535,17 @@ $(INST)/$(PILLOW): $(INST)/$(PYTHON) $(INST)/$(SETUPTOOLS)
 $(INST)/$(PKGCONFIG): $(INST)/$(PYTHON) $(INST)/$(SETUPTOOLS)
 	+$(PIPE) "$(SAGE_SPKG) $(PKGCONFIG) 2>&1" "tee -a $(SAGE_LOGS)/$(PKGCONFIG).log"
 
-$(INST)/$(NUMPY): $(INST)/$(PYTHON) $(INST)/$(ATLAS) $(INST)/$(PKGCONF)
+$(INST)/$(NUMPY): $(INST)/$(PYTHON) $(INST)/$(ATLAS)
 	+$(PIPE) "$(SAGE_SPKG) $(NUMPY) 2>&1" "tee -a $(SAGE_LOGS)/$(NUMPY).log"
 
 $(INST)/$(SCIPY): $(INST)/$(ATLAS) $(INST)/$(NUMPY)
 	+$(PIPE) "$(SAGE_SPKG) $(SCIPY) 2>&1" "tee -a $(SAGE_LOGS)/$(SCIPY).log"
 
 # matplotlib is needed to test cvxopt (i.e., if SAGE_CHECK=yes). See #12742.
 $(INST)/$(CVXOPT): $(INST)/$(NUMPY) \
-		   $(INST)/$(ATLAS) $(INST)/$(CEPHES) \
-		   $(INST)/$(GSL) $(INST)/$(GLPK) $(INST)/$(MATPLOTLIB)
+                   $(INST)/$(ATLAS) $(INST)/$(CEPHES) \
+                   $(INST)/$(GSL) $(INST)/$(GLPK) \
+                   | $(INST)/$(MATPLOTLIB)
 	+$(PIPE) "$(SAGE_SPKG) $(CVXOPT) 2>&1" "tee -a $(SAGE_LOGS)/$(CVXOPT).log"
 
 $(INST)/$(CEPHES):

build/install

@@ -13,7 +13,13 @@ SAGE_EXTCODE="$SAGE_SHARE/sage/ext"
 SAGE_LOGS="$SAGE_ROOT/logs/pkgs"
 SAGE_SPKG_INST="$SAGE_LOCAL/var/lib/sage/installed"
 SAGE_VERSION=`cat $SAGE_ROOT/VERSION.txt | sed 's+.*\ \(.*\),.*+\1+'`
+
+if [ -z "${SAGE_ORIG_PATH_SET}" ]; then
+    SAGE_ORIG_PATH=$PATH && export SAGE_ORIG_PATH
+    SAGE_ORIG_PATH_SET=True && export SAGE_ORIG_PATH_SET
+fi
 PATH="$SAGE_SRC/bin:$SAGE_LOCAL/bin:$PATH"
+
 PYTHONPATH="$SAGE_LOCAL"
 export SAGE_ROOT SAGE_SRC SAGE_LOCAL SAGE_EXTCODE SAGE_LOGS SAGE_SPKG_INST SAGE_VERSION PATH PYTHONPATH
 
@@ -84,17 +90,11 @@ if [ -z "$FC" ]; then
 fi
 
 if [ -f "$SAGE_LOCAL/bin/gcc" ]; then
-    # GCC is already installed. To disable unneeded rebuilding
-    # of GCC, we touch the installed file for GCC, such that it will
-    # really only be built if one of its dependencies has been upgraded.
-    echo >&2 "GCC was installed before, it will get re-installed if needed."
-    need_to_install_gcc=yes
-    for f in "$SAGE_SPKG_INST"/gcc-*; do
-        if [ -f "$f" ]; then
-            touch "$f"
-        fi
-    done
-elif [ -n "$SAGE_INSTALL_GCC" ]; then
+    # Ignore SAGE_INSTALL_GCC if GCC is already installed
+    SAGE_INSTALL_GCC=""
+fi
+
+if [ -n "$SAGE_INSTALL_GCC" ]; then
     # Check the value of the environment variable SAGE_INSTALL_GCC
     case "$SAGE_INSTALL_GCC" in
         yes)
@@ -113,7 +113,7 @@ else
 
     # Check whether $CXX is some version of GCC.  If it's a different
     # compiler, install GCC.
-    CXXtype=`testcxx.sh $CXX`
+    CXXtype=`source sage-env; testcxx.sh $CXX`
     if [ "$CXXtype" != GCC ]; then
         echo >&2 "Installing GCC because your '$CXX' isn't GCC (GNU C++)."
         need_to_install_gcc=yes
@@ -129,30 +129,24 @@ else
                 # https://groups.google.com/forum/?fromgroups#!topic/sage-devel/KCeFqQ_w2FE
                 echo >&2 "Installing GCC because you have $CXX version $GCCVERSION, which is quite old."
                 need_to_install_gcc=yes;;
-            4.4*|4.5*)
+            4.4.*|4.5.*)
                 # GCC 4.4.x and GCC 4.5.x fail to compile PARI/GP on ia64:
                 # * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46044
                 if [ x`uname -m` = xia64 ]; then
                     echo >&2 "Installing GCC because you have $CXX version $GCCVERSION on ia64."
                     echo >&2 "gcc <= 4.5 fails to compile PARI/GP on ia64."
                     need_to_install_gcc=yes
                 fi;;
-            4.6.[01])
-                # Also install GCC if we have version 4.6.0 or 4.6.1, which is
+            4.6.*)
+                # Also install GCC if we have version 4.6.* which is
                 # known to give trouble within Sage:
                 # * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48702
                 # * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48774
+                # * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52061
+                # * https://groups.google.com/d/msg/sage-release/xgmJ3nAcUOY/jH8OZjftYRsJ
                 echo >&2 "Installing GCC because you have $CXX version $GCCVERSION."
-                echo >&2 "gcc-4.6.0 and gcc-4.6.1 have known bugs affecting Sage."
+                echo >&2 "gcc-4.6.* has known bugs affecting Sage."
                 need_to_install_gcc=yes;;
-            4.6*)
-                # GCC 4.6.x doesn't compile ECL on Cygwin:
-                # * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52061
-                if uname | grep CYGWIN >/dev/null; then
-                    echo >&2 "Installing GCC because you have $CXX version $GCCVERSION on Cygwin."
-                    echo >&2 "gcc-4.6.x fails to compile ECL on Cygwin."
-                    need_to_install_gcc=yes
-                fi;;
             4.7.0)
                 # GCC 4.7.0 is very broken on ia64, see
                 # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48496
@@ -290,7 +284,7 @@ FPLLL=`newest_version libfplll`
 FREETYPE=`newest_version freetype`
 GAP=`newest_version gap`
 GCC=`newest_version gcc`
-GD=`newest_version gd`
+GD=`newest_version libgd`
 GDMODULE=`newest_version gdmodule`
 GFAN=`newest_version gfan`
 GF2X=`newest_version gf2x`
@@ -328,6 +322,7 @@ PARI_SEADATA_SMALL=`newest_version pari_seadata_small`
 PATCH=`newest_version patch`
 PEXPECT=`newest_version pexpect`
 PILLOW=`newest_version pillow`
+PIP=`newest_version pip`
 PKGCONF=`newest_version pkgconf`
 PKGCONFIG=`newest_version pkgconfig`
 POLYBORI=`newest_version polybori`

build/pkgs/arb/SPKG.txt

@@ -0,0 +1,29 @@
+= arb =
+
+== Description ==
+
+Arb is a C library for arbitrary-precision floating-point ball
+arithmetic, developed by Fredrik Johansson
+([email protected]). It supports efficient high-precision
+computation with polynomials, power series, matrices and special
+functions over the real and complex numbers, with automatic, rigorous
+error control.
+
+== License ==
+
+GNU General Public License v2+
+
+
+== Upstream Contact ==
+
+* Fredrik Johansson:  [email protected]
+
+
+== Dependencies ==
+
+* FLINT
+* MPIR or GMP
+* MPFR
+
+== Special Update/Build Instructions ==
+

build/pkgs/arb/checksums.ini

@@ -0,0 +1,4 @@
+tarball=arb-VERSION.tar.gz
+sha1=e96a54950b88e762fc80ab5eb88b2273aaf79be1
+md5=4a98e6aaa1108adfc5a46f1f64be0ec1
+cksum=1828799562

build/pkgs/arb/package-version.txt

@@ -0,0 +1,2 @@
+2.3.0
+

build/pkgs/arb/spkg-check

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+cd src
+$MAKE check

build/pkgs/arb/spkg-install

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+cd src
+
+./configure --prefix="$SAGE_LOCAL" --with-flint="$SAGE_LOCAL" \
+    --with-gmp="$SAGE_LOCAL" --with-mpfr="$SAGE_LOCAL"
+if [ $? -ne 0 ]; then
+    echo >&2 "Error configuring arb."
+    exit 1
+fi
+
+$MAKE
+if [ $? -ne 0 ]; then
+    echo >&2 "Error building arb."
+    exit 1
+fi
+
+$MAKE install
+if [ $? -ne 0 ]; then
+    echo >&2 "Error installing arb."
+    exit 1
+fi