This news release is just leaking out the truth slowly. However, there are also items in the news that make it appear the Satanists are still very powerful. This one from last week is one such example:. Something does not seem to be correct. Tony Blair is one of the evilest warmongers still breathing. Who is behind Q E pulling the strings now on her behalf?
Or is this his last award before being marched off to military tribunals? A message from Queen Elizabeth explained that Tony Blair was given this high reward due to outstanding —but secret- services to the British Empire. An MI6 source who knows Blair personally — and says he is not a very nice person — claims he was rewarded for helping to crush the German Fourth Reich. As a reminder, was a Nazi Reichstag fire that led to the U.
Nazi infiltrators in the top echelons of the British bureaucracy were also eliminated, paving the way for Brexit. No, no, no. That was something else! They make a public joke out of it to mock us. The interview can be seen below on YouTube. Speaking of sheep, we note that Ghislaine Maxwell was found guilty on 5 of 6 counts in the Epstein sex trafficking trial.
The real story — according to a Mossad contact in New York — is that Maxwell, who already switched sides months ago, handed over a lot of incriminating documents to the Alliance.
This will send hundreds of high-ranking Satanic cabal members to Gitmo for processing and execution. This is the real reason why the judge kept important details about the case under wraps. This is thanks in large part to double agents like Jeff Epstein and Maxwell. The next big priority is to complete the detoxification of the financial world. This has to do with the Rothschild-controlled banks.
Ian Fleming is the computer technologist who is protected by MI6 through a gentleman named Scot Lennon. We have his data… The fraudulent computer mainframe used to launder money to pay for the fifth columns, including the so-called public health emergency — another WMD [Weapons of Mass Destruction] scam — is owned and controlled by various groups that are retreating from us….
If you simply use these names, you will see that the vast majority of the criminal conspiracy to commit genocide is being put to flight. From GHC version 6. In Cabal Cabal prior to 1. If you use some extensions conditionally, using CPP or conditional module lists, it is good to replicate the condition in other-extensions declarations:. You could also omit the conditionally used extensions, as they are for information only, but it is recommended to replicate them in other-extensions declarations.
Deprecated in favor of default-extensions. A list of Haskell executables needed to build this component. Executables are provided during the whole duration of the component, so this field can be used for executables needed during test-suite as well.
Each is specified by the package containing the executable and the name of the executable itself, separated by a colon, and optionally followed by a version bound. All executables defined in the given Cabal file are termed as internal dependencies as opposed to the rest which are external dependencies. External dependencies can and should contain a version bound like conventional build-depends dependencies.
Internal dependencies should not contain a version bound, as they will be always resolved within the same configuration of the package in the build plan. For old-style builds, only for internal dependencies 1.
See build-tools for more information about backwards compatibility. Deprecated in favor of build-tool-depends , but see below for backwards compatibility information. A list of Haskell programs needed to build this component. Each may be followed by an optional version bound. Confusingly, each program in the list either refer to one of three things:. These cases are listed in order of priority: an executable in the package will override any of the hard-coded packages with the same name, and a hard-coded package will override any executable on the PATH.
In the first two cases, the list entry is desugared into a build-tool-depends entry. In the second case, it is desugared by looking up the package and executable name in a hard-coded table. In either case, the optional version bound is passed through unchanged. Although this field is deprecated in favor of build-tool-depends , there are some situations where you may prefer to use build-tools in cases 1 and 2 , as it is supported by more versions of Cabal. In case 3 , build-tool-depends is better for backwards-compatibility, as it will be ignored by old versions of Cabal; if you add the executable to build-tools , a setup script built against old Cabal will choke.
If an old version of Cabal is used, an end-user will have to manually arrange for the requested executable to be in your PATH. Identifiers specified in build-tools are desugared into their respective equivalent build-tool-depends form according to the table below. Consequently, a legacy specification such as:.
This built-in set can be programmatically extended via Custom setup scripts; this, however, is of limited use since the Cabal solver cannot access information injected by Custom setup scripts.
Is the component buildable? Like some of the other fields below, this field is more useful with the slightly more elaborate form of the simple build infrastructure described in the section on system-dependent parameters. Additional options for GHC. You can often achieve the same effect using the default-extensions field, which is preferred.
As with many other fields, whitespace can be escaped by using Haskell string syntax. Note that as of Cabal For GHC these correspond to the flags -fprof-auto-exported and -fprof-auto-top. Prior to Cabal These levels can be adjusted by the person building the package with the --profiling-detail and --library-profiling-detail flags.
It is typically better for the person building the package to pick the profiling detail level rather than for the package author. Additional options for GHC when the package is built as shared library. The options specified via this field are combined with the ones specified via ghc-options , and are passed to GHC during both the compile and link phases. A list of header files to be included in any compilations via C.
This field applies to both header files that are already installed on the system and to those coming with the package to be installed. The former files should be found in absolute paths, while the latter files should be found in paths relative to the top of the source tree or relative to one of the directories listed in include-dirs. These files typically contain function prototypes for foreign imports used by the package.
This is in contrast to install-includes , which lists header files that are intended to be exposed to other packages that transitively depend on this library. Files listed in install-includes should be found in relative to the top of the source tree or relative to one of the directories listed in include-dirs.
For example, here is a. Now any package that depends directly or transitively on the bindings-clib library can use clib. Note that in order for files listed in install-includes to be usable when compiling the package itself, they need to be listed in the includes field as well. A list of directories to search for header files, when preprocessing with c2hs , hsc2hs , cpphs or the C preprocessor, and also when compiling via C.
Directories can be absolute paths e. Cabal looks in these directories when attempting to locate files listed in includes and install-includes. The files listed in the cxx-sources can reference files listed in the c-sources field and vice-versa. The object files will be linked appropriately. A list of libraries that are supposed to be copied from the build directory alongside the produced Haskell libraries. Note that you are under the obligation to produce those libraries in the build directory e.
Libraries listed here will be included when copy -ing packages and be listed in the hs-libraries of the package configuration in the package database. Command-line arguments to be passed to the C compiler. Since the arguments are compiler-dependent, this field is more useful with the setup described in the section on system-dependent parameters.
Command-line arguments for pre-processing Haskell code. Applies to Haskell source and other pre-processed Haskell source like. Command-line arguments to be passed to the compiler when compiling C— code. See also cmm-sources. Command-line arguments to be passed to the assembler when compiling assembler code. See also asm-sources. Command-line arguments to be passed to the linker. A list of pkg-config packages, needed to build this package.
They can be annotated with versions, e. Cabal uses pkg-config to find if the packages are available on the system and to find the extra compilation and linker options needed to use the packages. If you need to bind to a C library that supports pkg-config then it is much preferable to use this field rather than hard code options into the other fields.
This entry is ignored on all other platforms. A list of packages mentioned in the build-depends field, each optionally accompanied by a list of module and module signature renamings. The simplest mixin syntax is simply the name of a package mentioned in the build-depends field.
More interesting is to use the mixin entry to rename one or more modules from the package, like this:. The current version of Cabal suffers from an infelicity in how the entries of mixins are parsed: an entry will fail to parse if the provided renaming clause has whitespace after the opening parenthesis.
This will be fixed in future versions of Cabal. See issues , , and There can be multiple mixin entries for a given package, in effect creating multiple copies of the dependency:. The requires clause is used to rename the module signatures required by a package:.
See the library:signatures field for more details. Mixin packages are part of the Backpack extension to the Haskell module system. The matching of the module signatures required by a build-depends dependency with the implementation modules present in another dependency is triggered by a coincidence of names. When the names of the signature and of the implementation are already the same, the matching is automatic. They must reside in a different package dependency, or at least in a separate internal library.
Library and executable sections may include conditional blocks, which test for various system parameters and configuration flags. The flags mechanism is rather generic, but most of the time a flag represents certain feature, that can be switched on or off by the package user.
Here is an example package description file using configurations:. Flags, conditionals, library and executable sections use layout to indicate structure. This is very similar to the Haskell layout rule.
Entries in a section have to all be indented to the same level which must be more than the section header. Tabs are not allowed to be used for indentation.
In this case the indentation of entries in a section does not matter, though different fields within a block must be on different lines. Here is a bit of the above example again, using braces:. Flag section declares a flag which can be used in conditional blocks. This value may be overridden in several ways.
The rationale for having flags default to True is that users usually want new features as soon as they are available. Flags representing features that are not yet recommended for most users such as experimental features or debugging support should therefore explicitly override the default to False.
By default, Cabal will first try to satisfy dependencies with the default flag value and then, if that is not possible, with the negated value. However, if the flag is manual, then the default value which can be overridden by commandline flags will be used. Conditional blocks may appear anywhere inside a library or executable section. They have to follow rather strict formatting rules.
Conditional blocks must always be of the shape. Note that the if and the condition have to be all on the same line. Since Cabal 2. The unary! Precedence levels may be overridden through the use of parentheses. Tests if the current operating system is name. The argument is tested against System. There is unfortunately some disagreement between Haskell implementations about the standard values of System.
Cabal canonicalises it so that in particular os windows works on all implementations. If the canonicalised os names match, this test evaluates to true, otherwise false. The match is case-insensitive. Tests if the current architecture is name. The argument is matched against System. If the arch names match, this test evaluates to true, otherwise false. Tests for the configured Haskell implementation. If the configured implementation is of the right type and matches the version constraint, then this evaluates to true, otherwise false.
Note that including a version constraint in an impl test causes it to check for two properties:. As a result,!
The test! Evaluates to the current assignment of the flag of the given name. Flag names are case insensitive. Testing for flags that have not been introduced with a flag section is an error. If a package descriptions specifies configuration flags the package user can control these in several ways. If the user does not fix the value of a flag, Cabal will try to find a flag assignment in the following way.
For each flag specified, it will assign its default value, evaluate all conditions with this flag assignment, and check if all dependencies can be satisfied. If this check succeeded, the package will be configured with those flag assignments. If dependencies were missing, the last flag as by the order in which the flags were introduced in the package description is tried with its alternative value and so on. This continues until either an assignment is found where all dependencies can be satisfied, or all possible flag assignments have been tried.
To put it another way, Cabal does a complete backtracking search to find a satisfiable package configuration. It is only the dependencies specified in the build-depends field in conditional blocks that determine if a particular flag assignment is satisfiable build-tools are not considered. The order of the declaration and the default value of the flags determines the search order.
Flags overridden on the command line fix the assignment of that flag, so no backtracking will be tried for that flag.
If no suitable flag assignment could be found, the configuration phase will fail and a list of missing dependencies will be printed. Note that this resolution process is exponential in the worst case i. There are some optimizations applied internally, but the overall complexity remains unchanged. During the configuration phase, a flag assignment is chosen, all conditionals are evaluated, and the package description is combined into a flat package descriptions.
If the same field is declared both inside a conditional and outside then they are combined using the following rules. Similarly, if two conditional sections appear at the same nesting level, properties specified in the latter will come after properties specified in the former. You can use build information fields in common stanzas.
Since Cabal 3. The name import was chosen, because there is includes field. It is often useful to be able to specify a source revision control repository for a package. Cabal lets you specify this information in a relatively structured form which enables other tools to interpret and make effective use of the information.
For example the information should be sufficient for an automatic tool to checkout the sources. Cabal supports specifying different information for various common source control systems. Obviously not all automated tools will support all source control systems. Cabal supports specifying repositories for different use cases. By declaring which case we mean automated tools can be more useful. There are currently two kinds defined:. The head kind refers to the latest development branch of the package.
This may be used for example to track activity of a project or as an indication to outside developers what sources to get for making new contributions. The this kind refers to the branch and tag of a repository that contains the sources for this version or release of a package. For most source control systems this involves specifying a tag, id or hash of some form and perhaps a branch. The purpose is to be able to reconstruct the sources corresponding to a particular package version.
This might be used to indicate what sources to get if someone needs to fix a bug in an older branch that is no longer an active head branch. You can specify one kind or the other or both.
As an example here are the repositories for the Cabal library. Note that the this kind of repository specifies a tag. The name of the source control system used for this repository. The currently recognised types are:. The location of the repository. The exact form of this field depends on the repository type. Many source control systems support the notion of a branch, as a distinct concept from having repositories in separate locations.
If you need to specify a branch to identify a your repository then specify it in this field. A tag identifies a particular state of a source repository. The tag can be used with a this repository kind to identify the state of a repository corresponding to a particular package version or release. The exact form of the tag depends on the repository type. This field is required for the this repository kind. Some projects put the sources for multiple packages under a single source repository.
This field lets you specify the relative path from the root of the repository to the top directory for the package, i. This field is optional. It defaults to empty which corresponds to the root directory of the repository.
The get command supports the following options:. The optional argument allows to choose a specific repository kind. Use source package index state as it existed at a previous time. Accepts unix-timestamps e. This determines which package versions are available as well as which. Unpack the original pristine tarball, rather than updating the. Since Cabal 1. Please refer to this article for more details.
As of Cabal library version 3. Custom Setup. The optional custom-setup stanza contains information needed for the compilation of custom Setup. The dependencies needed to compile Setup. See the build-depends field for a description of the syntax expected by this field. If the field is not specified the implicit package set will be used. The package set contains packages bundled with GHC i.
Cabal version is additionally restricted by GHC, with absolute minimum being 1. Versions prior to Cabal 1. Consequently, versions prior to Cabal 1. Consequently, if you need to write backward compatible Setup. Modules that are built automatically at setup, created with a custom setup script, must appear on other-modules for the library, executable, test-suite or benchmark stanzas or also on library:exposed-modules for libraries to be used, but are not really on the package when distributed.
This makes commands like sdist fail because the file is not found. These special modules must appear again on the autogen-modules field of the stanza that is using them, besides other-modules or library:exposed-modules.
With this there is no need to create complex build hooks for this poweruser case. Right now executable:main-is modules are not supported on autogen-modules. A list of header files from this package which are autogenerated e. Autogenerated header files are not packaged by sdist command. The placement on the target system of files listed in the data-files field varies between systems, and in some cases one can even move packages around after installation see prefix independence.
This module defines a function. If the argument is a filename listed in the data-files field, the result is the name of the corresponding file on the system on which the program is running.
For some packages, especially those interfacing with C libraries, implementation details and the build procedure depend on the build environment.
The build-type Configure can be used to handle many such situations. In this case, Setup. If you've got 2 projects: A and B and you want to develop them in parallel, its nice to use cabal-dev install A B - it will build and install them both to the local cabal-dev repository. If you re-run this command, they will be rebuilt and reinstalled if necessary. According to the documentation - If you want to register new or override existing package on local cabal-dev hackage , you should use cabal-dev add-source , which basically copy the source and allows you to install it like it was available on hackage.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Cabal with multiple Library sections Ask Question. Asked 8 years, 5 months ago. Active 4 years, 1 month ago. Viewed 3k times. Charles Wojciech Danilo Wojciech Danilo 11k 15 15 gold badges 61 61 silver badges bronze badges. Add a comment. Active Oldest Votes.
So, for example, if you have two libraries with cabal files that look like this: Name: my-library Then the cabal file for your executable can reference them like this: Name: my-program.
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