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updated documentation for cflags PR

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Gregory Becker 2016-05-25 10:56:12 -07:00
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155
lib/spack/docs/basic_usage.rst
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@ -102,8 +102,8 @@ that the packages is installed:
==> adept-utils is already installed in /home/gamblin2/spack/opt/chaos_5_x86_64_ib/gcc@4.4.7/adept-utils@1.0-5adef8da. ==> adept-utils is already installed in /home/gamblin2/spack/opt/chaos_5_x86_64_ib/gcc@4.4.7/adept-utils@1.0-5adef8da.
==> Trying to fetch from https://github.com/hpc/mpileaks/releases/download/v1.0/mpileaks-1.0.tar.gz ==> Trying to fetch from https://github.com/hpc/mpileaks/releases/download/v1.0/mpileaks-1.0.tar.gz
######################################################################## 100.0% ######################################################################## 100.0%
==> Staging archive: /home/gamblin2/spack/var/spack/stage/mpileaks@1.0%gcc@4.4.7=chaos_5_x86_64_ib-59f6ad23/mpileaks-1.0.tar.gz ==> Staging archive: /home/gamblin2/spack/var/spack/stage/mpileaks@1.0%gcc@4.4.7 arch=chaos_5_x86_64_ib-59f6ad23/mpileaks-1.0.tar.gz
==> Created stage in /home/gamblin2/spack/var/spack/stage/mpileaks@1.0%gcc@4.4.7=chaos_5_x86_64_ib-59f6ad23. ==> Created stage in /home/gamblin2/spack/var/spack/stage/mpileaks@1.0%gcc@4.4.7 arch=chaos_5_x86_64_ib-59f6ad23.
==> No patches needed for mpileaks. ==> No patches needed for mpileaks.
==> Building mpileaks. ==> Building mpileaks.
@ -132,10 +132,10 @@ sites, as installing a version that one user needs will not disrupt
existing installations for other users. existing installations for other users.
In addition to different versions, Spack can customize the compiler, In addition to different versions, Spack can customize the compiler,
compile-time options (variants), and platform (for cross compiles) of compile-time options (variants), compiler flags, and platform (for
an installation. Spack is unique in that it can also configure the cross compiles) of an installation. Spack is unique in that it can
*dependencies* a package is built with. For example, two also configure the *dependencies* a package is built with. For example,
configurations of the same version of a package, one built with boost two configurations of the same version of a package, one built with boost
1.39.0, and the other version built with version 1.43.0, can coexist. 1.39.0, and the other version built with version 1.43.0, can coexist.
This can all be done on the command line using the *spec* syntax. This can all be done on the command line using the *spec* syntax.
@ -334,6 +334,11 @@ of libelf would look like this:
-- chaos_5_x86_64_ib / gcc@4.4.7 -------------------------------- -- chaos_5_x86_64_ib / gcc@4.4.7 --------------------------------
libdwarf@20130729-d9b90962 libdwarf@20130729-d9b90962
We can also search for packages that have a certain attribute. For example,
``spack find -l libdwarf +debug`` will show only installations of libdwarf
with the 'debug' compile-time option enabled, while ``spack find -l +debug``
will find every installed package with a 'debug' compile-time option enabled.
The full spec syntax is discussed in detail in :ref:`sec-specs`. The full spec syntax is discussed in detail in :ref:`sec-specs`.
@ -463,6 +468,26 @@ For compilers, like ``clang``, that do not support Fortran, put
Once you save the file, the configured compilers will show up in the Once you save the file, the configured compilers will show up in the
list displayed by ``spack compilers``. list displayed by ``spack compilers``.
You can also add compiler flags to manually configured compilers. The
valid flags are ``cflags``, ``cxxflags``, ``fflags``, ``cppflags``,
``ldflags``, and ``ldlibs``. For example,::
...
chaos_5_x86_64_ib:
...
intel@15.0.0:
cc: /usr/local/bin/icc-15.0.024-beta
cxx: /usr/local/bin/icpc-15.0.024-beta
f77: /usr/local/bin/ifort-15.0.024-beta
fc: /usr/local/bin/ifort-15.0.024-beta
cppflags: -O3 -fPIC
...
These flags will be treated by spack as if they were enterred from
the command line each time this compiler is used. The compiler wrappers
then inject those flags into the compiler command. Compiler flags
enterred from the command line will be discussed in more detail in the
following section.
.. _sec-specs: .. _sec-specs:
@ -480,7 +505,7 @@ the full syntax of specs.
Here is an example of a much longer spec than we've seen thus far:: Here is an example of a much longer spec than we've seen thus far::
mpileaks @1.2:1.4 %gcc@4.7.5 +debug -qt =bgqos_0 ^callpath @1.1 %gcc@4.7.2 mpileaks @1.2:1.4 %gcc@4.7.5 +debug -qt arch=bgq_os ^callpath @1.1 %gcc@4.7.2
If provided to ``spack install``, this will install the ``mpileaks`` If provided to ``spack install``, this will install the ``mpileaks``
library at some version between ``1.2`` and ``1.4`` (inclusive), library at some version between ``1.2`` and ``1.4`` (inclusive),
@ -498,8 +523,12 @@ More formally, a spec consists of the following pieces:
* ``%`` Optional compiler specifier, with an optional compiler version * ``%`` Optional compiler specifier, with an optional compiler version
(``gcc`` or ``gcc@4.7.3``) (``gcc`` or ``gcc@4.7.3``)
* ``+`` or ``-`` or ``~`` Optional variant specifiers (``+debug``, * ``+`` or ``-`` or ``~`` Optional variant specifiers (``+debug``,
``-qt``, or ``~qt``) ``-qt``, or ``~qt``) for boolean variants
* ``=`` Optional architecture specifier (``bgqos_0``) * ``name=<value>`` Optional variant specifiers that are not restricted to
boolean variants
* ``name=<value>`` Optional compiler flag specifiers. Valid flag names are
``cflags``, ``cxxflags``, ``fflags``, ``cppflags``, ``ldflags``, and ``ldlibs``.
* ``arch=<value>`` Optional architecture specifier (``arch=bgq_os``)
* ``^`` Dependency specs (``^callpath@1.1``) * ``^`` Dependency specs (``^callpath@1.1``)
There are two things to notice here. The first is that specs are There are two things to notice here. The first is that specs are
@ -579,7 +608,7 @@ compilers, variants, and architectures just like any other spec.
Specifiers are associated with the nearest package name to their left. Specifiers are associated with the nearest package name to their left.
For example, above, ``@1.1`` and ``%gcc@4.7.2`` associates with the For example, above, ``@1.1`` and ``%gcc@4.7.2`` associates with the
``callpath`` package, while ``@1.2:1.4``, ``%gcc@4.7.5``, ``+debug``, ``callpath`` package, while ``@1.2:1.4``, ``%gcc@4.7.5``, ``+debug``,
``-qt``, and ``=bgqos_0`` all associate with the ``mpileaks`` package. ``-qt``, and ``arch=bgq_os`` all associate with the ``mpileaks`` package.
In the diagram above, ``mpileaks`` depends on ``mpich`` with an In the diagram above, ``mpileaks`` depends on ``mpich`` with an
unspecified version, but packages can depend on other packages with unspecified version, but packages can depend on other packages with
@ -635,22 +664,25 @@ based on site policies.
Variants Variants
~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
.. Note:: Variants are named options associated with a particular package. They are
optional, as each package must provide default values for each variant it
Variants are not yet supported, but will be in the next Spack makes available. Variants can be specified using
release (0.9), due in Q2 2015. a flexible parameter syntax ``name=<value>``. For example,
``spack install libelf debug=True`` will install libelf build with debug
Variants are named options associated with a particular package, and flags. The names of particular variants available for a package depend on
they can be turned on or off. For example, above, supplying what was provided by the package author. ``spack into <package>`` will
``+debug`` causes ``mpileaks`` to be built with debug flags. The
names of particular variants available for a package depend on what
was provided by the package author. ``spack info <package>`` will
provide information on what build variants are available. provide information on what build variants are available.
Depending on the package a variant may be on or off by default. For For compatibility with earlier versions, variants which happen to be
``mpileaks`` here, ``debug`` is off by default, and we turned it on boolean in nature can be specified by a syntax that represents turning
with ``+debug``. If a package is on by default you can turn it off by options on and off. For example, in the previous spec we could have
either adding ``-name`` or ``~name`` to the spec. supplied ``libelf +debug`` with the same effect of enabling the debug
compile time option for the libelf package.
Depending on the package a variant may have any default value. For
``libelf`` here, ``debug`` is ``False`` by default, and we turned it on
with ``debug=True`` or ``+debug``. If a package is ``True`` by default
you can turn it off by either adding ``-name`` or ``~name`` to the spec.
There are two syntaxes here because, depending on context, ``~`` and There are two syntaxes here because, depending on context, ``~`` and
``-`` may mean different things. In most shells, the following will ``-`` may mean different things. In most shells, the following will
@ -662,7 +694,7 @@ result in the shell performing home directory substitution:
mpileaks~debug # use this instead mpileaks~debug # use this instead
If there is a user called ``debug``, the ``~`` will be incorrectly If there is a user called ``debug``, the ``~`` will be incorrectly
expanded. In this situation, you would want to write ``mpileaks expanded. In this situation, you would want to write ``libelf
-debug``. However, ``-`` can be ambiguous when included after a -debug``. However, ``-`` can be ambiguous when included after a
package name without spaces: package name without spaces:
@ -677,12 +709,35 @@ package, not a request for ``mpileaks`` built without ``debug``
options. In this scenario, you should write ``mpileaks~debug`` to options. In this scenario, you should write ``mpileaks~debug`` to
avoid ambiguity. avoid ambiguity.
When spack normalizes specs, it prints them out with no spaces and When spack normalizes specs, it prints them out with no spaces boolean
uses only ``~`` for disabled variants. We allow ``-`` and spaces on variants using the backwards compatibility syntax and uses only ``~``
the command line is provided for convenience and legibility. for disabled boolean variants. We allow ``-`` and spaces on the command
line is provided for convenience and legibility.
Architecture specifier Compiler Flags
~~~~~~~~~~~~~~~~~~~~~~~
Compiler flags are specified using the same syntax as non-boolean variants,
but fulfill a different purpose. While the function of a variant is set by
the package, compiler flags are used by the compiler wrappers to inject
flags into the compile line of the build. Additionally, compiler flags are
inherited by dependencies. ``spack install libdwarf cppflags=\"-g\"`` will
install both libdwarf and libelf with the ``-g`` flag injected into their
compile line.
Notice that the value of the compiler flags must be escape quoted on the
command line. From within python files, the same spec would be specified
``libdwarf cppflags="-g"``. This is necessary because of how the shell
handles the quote symbols.
The six compiler flags are injected in the order of implicit make commands
in gnu autotools. If all flags are set, the order is
``$cppflags $cflags|$cxxflags $ldflags command $ldlibs`` for C and C++ and
``$fflags $cppflags $ldflags command $ldlibs`` for fortran.
Architecture specifiers
~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~
.. Note:: .. Note::
@ -690,12 +745,9 @@ Architecture specifier
Architecture specifiers are part of specs but are not yet Architecture specifiers are part of specs but are not yet
functional. They will be in Spack version 1.0, due in Q3 2015. functional. They will be in Spack version 1.0, due in Q3 2015.
The architecture specifier starts with a ``=`` and also comes after The architecture specifier looks identical to a variant specifier for a
some package name within a spec. It allows a user to specify a non-boolean variant. The architecture can be specified only using the
particular architecture for the package to be built. This is mostly reserved name ``arch`` (``arch=bgq_os``).
used for architectures that need cross-compilation, and in most cases,
users will not need to specify the architecture when they install a
package.
.. _sec-virtual-dependencies: .. _sec-virtual-dependencies:
@ -773,6 +825,23 @@ any MPI implementation will do. If another package depends on
error. Likewise, if you try to plug in some package that doesn't error. Likewise, if you try to plug in some package that doesn't
provide MPI, Spack will raise an error. provide MPI, Spack will raise an error.
Specifying Specs by Hash
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Complicated specs can become cumbersome to enter on the command line,
especially when many of the qualifications are necessary to
distinguish between similar installs, for example when using the
``uninstall`` command. To avoid this, when referencing an existing spec,
Spack allows you to reference specs by their hash. We previously
discussed the spec hash that Spack computes. In place of a spec in any
command, substitute ``/<hash>`` where ``<hash>`` is any amount from
the beginning of a spec hash. If the given spec hash is sufficient
to be unique, Spack will replace the reference with the spec to which
it refers. Otherwise, it will prompt for a more qualified hash.
Note that this will not work to reinstall a depencency uninstalled by
``spack uninstall -f``.
.. _spack-providers: .. _spack-providers:
``spack providers`` ``spack providers``
@ -1002,8 +1071,8 @@ than one installed package matches it), then Spack will warn you:
$ spack load libelf $ spack load libelf
==> Error: Multiple matches for spec libelf. Choose one: ==> Error: Multiple matches for spec libelf. Choose one:
libelf@0.8.13%gcc@4.4.7=chaos_5_x86_64_ib libelf@0.8.13%gcc@4.4.7 arch=chaos_5_x86_64_ib
libelf@0.8.13%intel@15.0.0=chaos_5_x86_64_ib libelf@0.8.13%intel@15.0.0 arch=chaos_5_x86_64_ib
You can either type the ``spack load`` command again with a fully You can either type the ``spack load`` command again with a fully
qualified argument, or you can add just enough extra constraints to qualified argument, or you can add just enough extra constraints to
@ -1282,7 +1351,7 @@ You can find extensions for your Python installation like this:
.. code-block:: sh .. code-block:: sh
$ spack extensions python $ spack extensions python
==> python@2.7.8%gcc@4.4.7=chaos_5_x86_64_ib-703c7a96 ==> python@2.7.8%gcc@4.4.7 arch=chaos_5_x86_64_ib-703c7a96
==> 36 extensions: ==> 36 extensions:
geos py-ipython py-pexpect py-pyside py-sip geos py-ipython py-pexpect py-pyside py-sip
py-basemap py-libxml2 py-pil py-pytz py-six py-basemap py-libxml2 py-pil py-pytz py-six
@ -1372,9 +1441,9 @@ installation:
.. code-block:: sh .. code-block:: sh
$ spack activate py-numpy $ spack activate py-numpy
==> Activated extension py-setuptools@11.3.1%gcc@4.4.7=chaos_5_x86_64_ib-3c74eb69 for python@2.7.8%gcc@4.4.7. ==> Activated extension py-setuptools@11.3.1%gcc@4.4.7 arch=chaos_5_x86_64_ib-3c74eb69 for python@2.7.8%gcc@4.4.7.
==> Activated extension py-nose@1.3.4%gcc@4.4.7=chaos_5_x86_64_ib-5f70f816 for python@2.7.8%gcc@4.4.7. ==> Activated extension py-nose@1.3.4%gcc@4.4.7 arch=chaos_5_x86_64_ib-5f70f816 for python@2.7.8%gcc@4.4.7.
==> Activated extension py-numpy@1.9.1%gcc@4.4.7=chaos_5_x86_64_ib-66733244 for python@2.7.8%gcc@4.4.7. ==> Activated extension py-numpy@1.9.1%gcc@4.4.7 arch=chaos_5_x86_64_ib-66733244 for python@2.7.8%gcc@4.4.7.
Several things have happened here. The user requested that Several things have happened here. The user requested that
``py-numpy`` be activated in the ``python`` installation it was built ``py-numpy`` be activated in the ``python`` installation it was built
@ -1389,7 +1458,7 @@ packages listed as activated:
.. code-block:: sh .. code-block:: sh
$ spack extensions python $ spack extensions python
==> python@2.7.8%gcc@4.4.7=chaos_5_x86_64_ib-703c7a96 ==> python@2.7.8%gcc@4.4.7 arch=chaos_5_x86_64_ib-703c7a96
==> 36 extensions: ==> 36 extensions:
geos py-ipython py-pexpect py-pyside py-sip geos py-ipython py-pexpect py-pyside py-sip
py-basemap py-libxml2 py-pil py-pytz py-six py-basemap py-libxml2 py-pil py-pytz py-six
@ -1437,7 +1506,7 @@ dependencies, you can use ``spack activate -f``:
.. code-block:: sh .. code-block:: sh
$ spack activate -f py-numpy $ spack activate -f py-numpy
==> Activated extension py-numpy@1.9.1%gcc@4.4.7=chaos_5_x86_64_ib-66733244 for python@2.7.8%gcc@4.4.7. ==> Activated extension py-numpy@1.9.1%gcc@4.4.7 arch=chaos_5_x86_64_ib-66733244 for python@2.7.8%gcc@4.4.7.
.. _spack-deactivate: .. _spack-deactivate:

12
lib/spack/docs/configuration.rst
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@ -70,9 +70,9 @@ directory. Here's an example of an external configuration:
packages: packages:
openmpi: openmpi:
paths: paths:
openmpi@1.4.3%gcc@4.4.7=chaos_5_x86_64_ib: /opt/openmpi-1.4.3 openmpi@1.4.3%gcc@4.4.7 arch=chaos_5_x86_64_ib: /opt/openmpi-1.4.3
openmpi@1.4.3%gcc@4.4.7=chaos_5_x86_64_ib+debug: /opt/openmpi-1.4.3-debug openmpi@1.4.3%gcc@4.4.7 arch=chaos_5_x86_64_ib+debug: /opt/openmpi-1.4.3-debug
openmpi@1.6.5%intel@10.1=chaos_5_x86_64_ib: /opt/openmpi-1.6.5-intel openmpi@1.6.5%intel@10.1 arch=chaos_5_x86_64_ib: /opt/openmpi-1.6.5-intel
This example lists three installations of OpenMPI, one built with gcc, This example lists three installations of OpenMPI, one built with gcc,
one built with gcc and debug information, and another built with Intel. one built with gcc and debug information, and another built with Intel.
@ -108,9 +108,9 @@ be:
packages: packages:
openmpi: openmpi:
paths: paths:
openmpi@1.4.3%gcc@4.4.7=chaos_5_x86_64_ib: /opt/openmpi-1.4.3 openmpi@1.4.3%gcc@4.4.7 arch=chaos_5_x86_64_ib: /opt/openmpi-1.4.3
openmpi@1.4.3%gcc@4.4.7=chaos_5_x86_64_ib+debug: /opt/openmpi-1.4.3-debug openmpi@1.4.3%gcc@4.4.7 arch=chaos_5_x86_64_ib+debug: /opt/openmpi-1.4.3-debug
openmpi@1.6.5%intel@10.1=chaos_5_x86_64_ib: /opt/openmpi-1.6.5-intel openmpi@1.6.5%intel@10.1 arch=chaos_5_x86_64_ib: /opt/openmpi-1.6.5-intel
buildable: False buildable: False
The addition of the ``buildable`` flag tells Spack that it should never build The addition of the ``buildable`` flag tells Spack that it should never build

15
lib/spack/docs/features.rst
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@ -31,14 +31,21 @@ platform, all on the command line.
# Specify a compiler (and its version), with % # Specify a compiler (and its version), with %
$ spack install mpileaks@1.1.2 %gcc@4.7.3 $ spack install mpileaks@1.1.2 %gcc@4.7.3
# Add special compile-time options with + # Add special compile-time options by name
$ spack install mpileaks@1.1.2 %gcc@4.7.3 debug=True
# Add special boolean compile-time options with +
$ spack install mpileaks@1.1.2 %gcc@4.7.3 +debug $ spack install mpileaks@1.1.2 %gcc@4.7.3 +debug
# Cross-compile for a different architecture with = # Add compiler flags using the conventional names
$ spack install mpileaks@1.1.2 =bgqos_0 $ spack install mpileaks@1.1.2 %gcc@4.7.3 cppflags=\"-O3 -floop-block\"
# Cross-compile for a different architecture with arch=
$ spack install mpileaks@1.1.2 arch=bgqos_0
Users can specify as many or few options as they care about. Spack Users can specify as many or few options as they care about. Spack
will fill in the unspecified values with sensible defaults. will fill in the unspecified values with sensible defaults. The two listed
syntaxes for variants are identical when the value is boolean.
Customize dependencies Customize dependencies

48
lib/spack/docs/packaging_guide.rst
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@ -1221,11 +1221,13 @@ just as easily provide a version range:
depends_on("libelf@0.8.2:0.8.4:") depends_on("libelf@0.8.2:0.8.4:")
Or a requirement for a particular variant: Or a requirement for a particular variant or compiler flags:
.. code-block:: python .. code-block:: python
depends_on("libelf@0.8+debug") depends_on("libelf@0.8+debug")
depends_on('libelf debug=True')
depends_on('libelf cppflags="-fPIC")
Both users *and* package authors can use the same spec syntax to refer Both users *and* package authors can use the same spec syntax to refer
to different package configurations. Users use the spec syntax on the to different package configurations. Users use the spec syntax on the
@ -1623,21 +1625,21 @@ the user runs ``spack install`` and the time the ``install()`` method
is called. The concretized version of the spec above might look like is called. The concretized version of the spec above might look like
this:: this::
mpileaks@2.3%gcc@4.7.3=linux-ppc64 mpileaks@2.3%gcc@4.7.3 arch=linux-ppc64
^callpath@1.0%gcc@4.7.3+debug=linux-ppc64 ^callpath@1.0%gcc@4.7.3+debug arch=linux-ppc64
^dyninst@8.1.2%gcc@4.7.3=linux-ppc64 ^dyninst@8.1.2%gcc@4.7.3 arch=linux-ppc64
^libdwarf@20130729%gcc@4.7.3=linux-ppc64 ^libdwarf@20130729%gcc@4.7.3 arch=linux-ppc64
^libelf@0.8.11%gcc@4.7.3=linux-ppc64 ^libelf@0.8.11%gcc@4.7.3 arch=linux-ppc64
^mpich@3.0.4%gcc@4.7.3=linux-ppc64 ^mpich@3.0.4%gcc@4.7.3 arch=linux-ppc64
.. graphviz:: .. graphviz::
digraph { digraph {
"mpileaks@2.3\n%gcc@4.7.3\n=linux-ppc64" -> "mpich@3.0.4\n%gcc@4.7.3\n=linux-ppc64" "mpileaks@2.3\n%gcc@4.7.3\n arch=linux-ppc64" -> "mpich@3.0.4\n%gcc@4.7.3\n arch=linux-ppc64"
"mpileaks@2.3\n%gcc@4.7.3\n=linux-ppc64" -> "callpath@1.0\n%gcc@4.7.3+debug\n=linux-ppc64" -> "mpich@3.0.4\n%gcc@4.7.3\n=linux-ppc64" "mpileaks@2.3\n%gcc@4.7.3\n arch=linux-ppc64" -> "callpath@1.0\n%gcc@4.7.3+debug\n arch=linux-ppc64" -> "mpich@3.0.4\n%gcc@4.7.3\n arch=linux-ppc64"
"callpath@1.0\n%gcc@4.7.3+debug\n=linux-ppc64" -> "dyninst@8.1.2\n%gcc@4.7.3\n=linux-ppc64" "callpath@1.0\n%gcc@4.7.3+debug\n arch=linux-ppc64" -> "dyninst@8.1.2\n%gcc@4.7.3\n arch=linux-ppc64"
"dyninst@8.1.2\n%gcc@4.7.3\n=linux-ppc64" -> "libdwarf@20130729\n%gcc@4.7.3\n=linux-ppc64" -> "libelf@0.8.11\n%gcc@4.7.3\n=linux-ppc64" "dyninst@8.1.2\n%gcc@4.7.3\n arch=linux-ppc64" -> "libdwarf@20130729\n%gcc@4.7.3\n arch=linux-ppc64" -> "libelf@0.8.11\n%gcc@4.7.3\n arch=linux-ppc64"
"dyninst@8.1.2\n%gcc@4.7.3\n=linux-ppc64" -> "libelf@0.8.11\n%gcc@4.7.3\n=linux-ppc64" "dyninst@8.1.2\n%gcc@4.7.3\n arch=linux-ppc64" -> "libelf@0.8.11\n%gcc@4.7.3\n arch=linux-ppc64"
} }
Here, all versions, compilers, and platforms are filled in, and there Here, all versions, compilers, and platforms are filled in, and there
@ -1666,9 +1668,9 @@ running ``spack spec``. For example:
^libdwarf ^libdwarf
^libelf ^libelf
dyninst@8.0.1%gcc@4.7.3=linux-ppc64 dyninst@8.0.1%gcc@4.7.3 arch=linux-ppc64
^libdwarf@20130729%gcc@4.7.3=linux-ppc64 ^libdwarf@20130729%gcc@4.7.3 arch=linux-ppc64
^libelf@0.8.13%gcc@4.7.3=linux-ppc64 ^libelf@0.8.13%gcc@4.7.3 arch=linux-ppc64
This is useful when you want to know exactly what Spack will do when This is useful when you want to know exactly what Spack will do when
you ask for a particular spec. you ask for a particular spec.
@ -1908,6 +1910,12 @@ the command line.
``$rpath_flag`` can be overriden on a compiler specific basis in ``$rpath_flag`` can be overriden on a compiler specific basis in
``lib/spack/spack/compilers/$compiler.py``. ``lib/spack/spack/compilers/$compiler.py``.
The compiler wrappers also pass the compiler flags specified by the user from
the command line (``cflags``, ``cxxflags``, ``fflags``, ``cppflags``, ``ldflags``,
and/or ``ldlibs``). They do not override the canonical autotools flags with the
same names (but in ALL-CAPS) that may be passed into the build by particularly
challenging package scripts.
Compiler flags Compiler flags
~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~
In rare circumstances such as compiling and running small unit tests, a package In rare circumstances such as compiling and running small unit tests, a package
@ -2154,12 +2162,12 @@ example:
def install(self, prefix): def install(self, prefix):
# Do default install # Do default install
@when('=chaos_5_x86_64_ib') @when('arch=chaos_5_x86_64_ib')
def install(self, prefix): def install(self, prefix):
# This will be executed instead of the default install if # This will be executed instead of the default install if
# the package's sys_type() is chaos_5_x86_64_ib. # the package's sys_type() is chaos_5_x86_64_ib.
@when('=bgqos_0") @when('arch=bgqos_0")
def install(self, prefix): def install(self, prefix):
# This will be executed if the package's sys_type is bgqos_0 # This will be executed if the package's sys_type is bgqos_0
@ -2749,11 +2757,11 @@ build it:
$ spack stage libelf $ spack stage libelf
==> Trying to fetch from http://www.mr511.de/software/libelf-0.8.13.tar.gz ==> Trying to fetch from http://www.mr511.de/software/libelf-0.8.13.tar.gz
######################################################################## 100.0% ######################################################################## 100.0%
==> Staging archive: /Users/gamblin2/src/spack/var/spack/stage/libelf@0.8.13%gcc@4.8.3=linux-ppc64/libelf-0.8.13.tar.gz ==> Staging archive: /Users/gamblin2/src/spack/var/spack/stage/libelf@0.8.13%gcc@4.8.3 arch=linux-ppc64/libelf-0.8.13.tar.gz
==> Created stage in /Users/gamblin2/src/spack/var/spack/stage/libelf@0.8.13%gcc@4.8.3=linux-ppc64. ==> Created stage in /Users/gamblin2/src/spack/var/spack/stage/libelf@0.8.13%gcc@4.8.3 arch=linux-ppc64.
$ spack cd libelf $ spack cd libelf
$ pwd $ pwd
/Users/gamblin2/src/spack/var/spack/stage/libelf@0.8.13%gcc@4.8.3=linux-ppc64/libelf-0.8.13 /Users/gamblin2/src/spack/var/spack/stage/libelf@0.8.13%gcc@4.8.3 arch=linux-ppc64/libelf-0.8.13
``spack cd`` here changed he current working directory to the ``spack cd`` here changed he current working directory to the
directory containing the expanded ``libelf`` source code. There are a directory containing the expanded ``libelf`` source code. There are a