Commit Graph

221 Commits

Author SHA1 Message Date
Mariusz Ceier 9383e9c1e6 Fix lld macho standalone build by including llvm/Config/llvm-config.h instead of llvm/Config/config.h
lld/MachO/Driver.cpp and lld/MachO/SyntheticSections.cpp include
llvm/Config/config.h which doesn't exist when building standalone lld.

This patch replaces llvm/Config/config.h include with llvm/Config/llvm-config.h
just like it is in lld/ELF/Driver.cpp and HAVE_LIBXAR with LLVM_HAVE_LIXAR and
moves LLVM_HAVE_LIBXAR from config.h to llvm-config.h

Also it adds LLVM_HAVE_LIBXAR to LLVMConfig.cmake and links liblldMachO2.so
with XAR_LIB if LLVM_HAVE_LIBXAR is set.

Differential Revision: https://reviews.llvm.org/D102084
2021-05-19 11:15:07 -04:00
Martin Storsjö f8de9aaef2 [llvm-rc] Add a GNU windres-like frontend to llvm-rc
This primarily parses a different set of options and invokes the same
resource compiler as llvm-rc normally. Additionally, it can convert
directly to an object file (which in MSVC style setups is done with the
separate cvtres tool, or by the linker).

(GNU windres also supports other conversions; from coff object file back
to .res, and from .res or object file back to .rc form; that's not yet
implemented.)

The other bigger complication lies in being able to imply or pass the
intended target triple, to let clang find the corresponding mingw sysroot
for finding include files, and for specifying the default output object
machine format.

It can be implied from the tool triple prefix, like
`<triple>-[llvm-]windres` or picked up from the windres option e.g.
`-F pe-x86-64`. In GNU windres, that option takes BFD style format names
such as pe-i386 or pe-x86-64. As libbfd in binutils doesn't support
Windows on ARM, there's no such canonical name for the ARM targets.
Therefore, as an LLVM specific extension, this option is extended to
allow passing full triples, too.

Differential Revision: https://reviews.llvm.org/D100756
2021-04-26 22:04:29 +03:00
Nico Weber 1a3f88658a [llvm-objdump] Add an llvm-otool tool
This implements an LLVM tool that's flag- and output-compatible
with macOS's `otool` -- except for bugs, but from testing with both
`otool` and `xcrun otool-classic`, llvm-otool matches vanilla
otool's behavior very well already. It's not 100% perfect, but
it's a very solid start.

This uses the same approach as llvm-objcopy: llvm-objdump uses
a different OptTable when it's invoked as llvm-otool. This
is possible thanks to D100433.

Differential Revision: https://reviews.llvm.org/D100583
2021-04-20 08:24:58 -04:00
David Blaikie ae217bf1f3 Conditionalize the JIT test dependency 2021-03-30 13:04:02 -07:00
Stella Stamenova 54ab62e8ea Revert "Add missing dependency to fix building the jit tests"
This breaks the windows bots because the dependency does not exist on Windows.
Per the cmake file:

if(CMAKE_HOST_UNIX)
  add_subdirectory(LLJITWithRemoteDebugging)
endif()

This reverts commit bd56e91fdb.
2021-03-29 20:06:31 -07:00
David Blaikie bd56e91fdb Add missing dependency to fix building the jit tests 2021-03-29 17:33:08 -07:00
Andrew Litteken 0776eca7a4 Revert "[IRSim] Adding basic implementation of llvm-sim."
Causing build errors on the Windows Buildbots.

This reverts commit 5155dff278.
2021-03-20 18:03:09 -05:00
Andrew Litteken 5155dff278 [IRSim] Adding basic implementation of llvm-sim.
This is a similarity visualization tool that accepts a Module and
passes it to the IRSimilarityIdentifier.  The resulting SimilarityGroups
are output in a JSON file.

Tests are found in test/tools/llvm-sim and check for the file not found,
a bad module, and that the JSON is created correctly.

Reviewers: paquette, jroelofs, MaskRay

Recommit of: 15645d044b to fix linking
errors.

Differential Revision: https://reviews.llvm.org/D86974
2021-03-20 16:47:50 -05:00
Stella Stamenova ed98676fa4 Support multi-configuration generators correctly in several config files
Multi-configuration generators (such as Visual Studio and Xcode) allow the specification of a build flavor at build time instead of config time, so the lit configuration files need to support that - and they do for the most part. There are several places that had one of two issues (or both!):

1) Paths had %(build_mode)s set up, but then not configured, resulting in values that would not work correctly e.g. D:/llvm-build/%(build_mode)s/bin/dsymutil.exe
2) Paths did not have %(build_mode)s set up, but instead contained $(Configuration) (which is the value for Visual Studio at configuration time, for Xcode they would have had the equivalent) e.g. "D:/llvm-build/$(Configuration)/lib".

This seems to indicate that we still have a lot of fragility in the configurations, but also that a number of these paths are never used (at least on Windows) since the errors appear to have been there a while.

This patch fixes the configurations and it has been tested with Ninja and Visual Studio to generate the correct paths. We should consider removing some of these settings altogether.

Reviewed By: JDevlieghere, mehdi_amini

Differential Revision: https://reviews.llvm.org/D96427
2021-02-11 09:32:20 -08:00
Fangrui Song b4cbb87fea [CMake] Add llvm-profgen to LLVM_TEST_DEPENDS
Otherwise `check-llvm-*` may not rebuild llvm-profgen, causing llvm-profgen tests
to fail if llvm-profgen happens to be stale.
2020-12-09 09:34:51 -08:00
Alexander Shaposhnikov 5495b69164 [llvm-objcopy][MachO] Add llvm-bitcode-strip driver
This diff adds llvm-bitcode-strip driver to llvm-objcopy.
In the future this will enable us to build a replacement for the tool bitcode_strip.

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D87212
2020-09-18 18:13:05 -07:00
jasonliu 1321160a26 Disable a large test for EXPENSIVE_CHECKS and debug build
Summary:
When running a large test in LLVM_ENABLE_EXPENSIVE_CHECKS=ON mode,
buildbot could hit timeout.
Disable the test when this mode is on.
Also disable it for debug so that the test won't hang for too long.

Reviewed By: hubert.reinterpretcast

Differential Revision: https://reviews.llvm.org/D87794
2020-09-16 21:57:34 +00:00
Petr Hosek c4d7536136 [CMake] Simplify CMake handling for libxml2
This matches the changes made to handling of zlib done in 10b1b4a
where we rely on find_package and the imported target rather than
manually appending the library and include paths. The use of
LLVM_LIBXML2_ENABLED has been replaced by LLVM_ENABLE_LIBXML2
thus reducing the number of variables.

Differential Revision: https://reviews.llvm.org/D84563
2020-09-09 21:44:44 -07:00
Eric Christopher ea7b1c79f7 Add cmake test support for LLJITWithThinLTOSummaries to make sure
it's being built and called (and substituted).
2020-08-26 11:46:09 -07:00
Petr Hosek 31e5f7120b [CMake] Simplify CMake handling for zlib
Rather than handling zlib handling manually, use find_package from CMake
to find zlib properly. Use this to normalize the LLVM_ENABLE_ZLIB,
HAVE_ZLIB, HAVE_ZLIB_H. Furthermore, require zlib if LLVM_ENABLE_ZLIB is
set to YES, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.

This is a reland of abb0075 with all followup changes and fixes that
should address issues that were reported in PR44780.

Differential Revision: https://reviews.llvm.org/D79219
2020-08-11 20:22:11 -07:00
Petr Hosek a4d78d23c5 Revert "[CMake] Simplify CMake handling for zlib"
This reverts commit ccbc1485b5 which
is still failing on the Windows MLIR bots.
2020-08-08 17:08:23 -07:00
Petr Hosek ccbc1485b5 [CMake] Simplify CMake handling for zlib
Rather than handling zlib handling manually, use find_package from CMake
to find zlib properly. Use this to normalize the LLVM_ENABLE_ZLIB,
HAVE_ZLIB, HAVE_ZLIB_H. Furthermore, require zlib if LLVM_ENABLE_ZLIB is
set to YES, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.

This is a reland of abb0075 with all followup changes and fixes that
should address issues that were reported in PR44780.

Differential Revision: https://reviews.llvm.org/D79219
2020-08-08 16:44:08 -07:00
Christian Kühnel f3cc4df51d Revert "[CMake] Simplify CMake handling for zlib"
This reverts commit 1adc494bce.
This patch broke the Windows compilation on buildbot and pre-merge testing:
http://lab.llvm.org:8011/builders/mlir-windows/builds/5945
https://buildkite.com/llvm-project/llvm-master-build/builds/780
2020-08-07 09:36:49 +02:00
Petr Hosek 1adc494bce [CMake] Simplify CMake handling for zlib
Rather than handling zlib handling manually, use find_package from CMake
to find zlib properly. Use this to normalize the LLVM_ENABLE_ZLIB,
HAVE_ZLIB, HAVE_ZLIB_H. Furthermore, require zlib if LLVM_ENABLE_ZLIB is
set to YES, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.

This is a reland of abb0075 with all followup changes and fixes that
should address issues that were reported in PR44780.

Differential Revision: https://reviews.llvm.org/D79219
2020-08-05 16:07:11 -07:00
Hans Wennborg 3ab01550b6 Revert "[CMake] Simplify CMake handling for zlib"
This quietly disabled use of zlib on Windows even when building with
-DLLVM_ENABLE_ZLIB=FORCE_ON.

> Rather than handling zlib handling manually, use find_package from CMake
> to find zlib properly. Use this to normalize the LLVM_ENABLE_ZLIB,
> HAVE_ZLIB, HAVE_ZLIB_H. Furthermore, require zlib if LLVM_ENABLE_ZLIB is
> set to YES, which requires the distributor to explicitly select whether
> zlib is enabled or not. This simplifies the CMake handling and usage in
> the rest of the tooling.
>
> This is a reland of abb0075 with all followup changes and fixes that
> should address issues that were reported in PR44780.
>
> Differential Revision: https://reviews.llvm.org/D79219

This reverts commit 10b1b4a231 and follow-ups
64d99cc6ab and
f9fec0447e.
2020-08-05 12:31:44 +02:00
Fangrui Song bcea3a7a28 Add test utility 'split-file'
See https://lists.llvm.org/pipermail/llvm-dev/2020-July/143373.html
"[llvm-dev] Multiple documents in one test file" for some discussions.

This patch has explored several alternatives. The current semantics are similar to
what @dblaikie proposed.
`split-file filename output` splits the input file into multiple parts separated by
regex `^(.|//)--- filename` and write each part to the file `output/filename`
(`filename` can include path separators).

Use case A (organizing input of different formats (e.g. linker
script+assembly) in one file).

```
# RUN: split-file %s %t
# RUN: llvm-mc %t/asm -o %t.o
# RUN: ld.lld -T %t/lds %t.o -o %t
This is sometimes better than the %S/Inputs/ approach because the user
can see the auxiliary files immediately and don't have to open another file.

# asm
...
# lds
...
```

Use case B (for utilities which don't have built-in input splitting
feature):

```
// RUN: split-file %s %t
// RUN: llc < %t/1.ll | FileCheck %s --check-prefix=CASE1
// RUN: llc < %t/2.ll | FileCheck %s --check-prefix=CASE2
Combing tests prudently can improve readability.
For example, when testing parsing errors if the recovery mechanism isn't possible,
grouping the tests in one file can more readily see test coverage/strategy.

//--- 1.ll
...
//--- 2.ll
...
```

Since this is a new utility, there is no git history concerns for
UpperCase variable names. I use lowerCase variable names like mlir/lld.

Reviewed By: jhenderson, lattner

Differential Revision: https://reviews.llvm.org/D83834
2020-08-03 20:42:09 -07:00
Fangrui Song dd405f1a53 Revert D83834 "Add test utility 'extract'"
This reverts commit d054c7ee2e.

There are discussions about the utility name, its functionality and user interface.
Revert before we reach consensus.
2020-07-28 13:26:33 -07:00
Petr Hosek 10b1b4a231 [CMake] Simplify CMake handling for zlib
Rather than handling zlib handling manually, use find_package from CMake
to find zlib properly. Use this to normalize the LLVM_ENABLE_ZLIB,
HAVE_ZLIB, HAVE_ZLIB_H. Furthermore, require zlib if LLVM_ENABLE_ZLIB is
set to YES, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.

This is a reland of abb0075 with all followup changes and fixes that
should address issues that were reported in PR44780.

Differential Revision: https://reviews.llvm.org/D79219
2020-07-23 23:05:36 -07:00
Fangrui Song d054c7ee2e Add test utility 'extract'
See https://lists.llvm.org/pipermail/llvm-dev/2020-July/143373.html
"[llvm-dev] Multiple documents in one test file" for some discussions.

`extract part filename` splits the input file into multiple parts separated by
regex `^(.|//)--- ` and extract the specified part to stdout or the
output file (if specified).

Use case A (organizing input of different formats (e.g. linker
script+assembly) in one file).

```
// RUN: extract lds %s -o %t.lds
// RUN: extract asm %s -o %t.s
// RUN: llvm-mc %t.s -o %t.o
// RUN: ld.lld -T %t.lds %t.o -o %t
This is sometimes better than the %S/Inputs/ approach because the user
can see the auxiliary files immediately and don't have to open another file.
```

Use case B (for utilities which don't have built-in input splitting
feature):

```
// RUN: extract case1 %s | llc | FileCheck %s --check-prefix=CASE1
// RUN: extract case2 %s | llc | FileCheck %s --check-prefix=CASE2
Combing tests prudently can improve readability.
This is sometimes better than having multiple test files.
```

Since this is a new utility, there is no git history concerns for
UpperCase variable names. I use lowerCase variable names like mlir/lld.

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D83834
2020-07-23 19:15:35 -07:00
Petr Hosek 38c71b7c85 Revert "[CMake] Simplify CMake handling for zlib"
This reverts commit 1d09ecf361 since
it breaks sanitizer bots.
2020-07-23 15:12:42 -07:00
Petr Hosek 1d09ecf361 [CMake] Simplify CMake handling for zlib
Rather than handling zlib handling manually, use find_package from CMake
to find zlib properly. Use this to normalize the LLVM_ENABLE_ZLIB,
HAVE_ZLIB, HAVE_ZLIB_H. Furthermore, require zlib if LLVM_ENABLE_ZLIB is
set to YES, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.

This is a reland of abb0075 with all followup changes and fixes that
should address issues that were reported in PR44780.

Differential Revision: https://reviews.llvm.org/D79219
2020-07-23 14:47:25 -07:00
Sameer Arora 6c43ed608d Introducing llvm-libtool-darwin
This diff starts the implementation of llvm-libtool-darwin
(an llvm based replacement of cctool's libtool).
Libtool is used for creating static and dynamic libraries
from a bunch of object files given as input.

Reviewed by alexshap, smeenai, jhenderson, MaskRay

Differential Revision: https://reviews.llvm.org/D82923
2020-07-17 08:07:02 -07:00
Mircea Trofin 9870f77441 [llvm] Moved InlineSizeEstimatorAnalysis test to .ll
Summary:
Following guidance in
https://llvm.org/docs/TestingGuide.html#testing-analysis

Reviewers: mehdi_amini

Subscribers: mgorny, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D83918
2020-07-16 12:25:16 -07:00
Petr Hosek bcd27d9d73 Revert "[CMake] Simplify CMake handling for zlib"
This reverts commit 8c1a79dc12 because
it fails when zlib isn't installed.
2020-07-14 19:56:10 -07:00
Petr Hosek 8c1a79dc12 [CMake] Simplify CMake handling for zlib
Rather than handling zlib handling manually, use find_package from CMake
to find zlib properly. Use this to normalize the LLVM_ENABLE_ZLIB,
HAVE_ZLIB, HAVE_ZLIB_H. Furthermore, require zlib if LLVM_ENABLE_ZLIB is
set to YES, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.

This is a reland of abb0075 with all followup changes and fixes that
should address issues that were reported in PR44780.

Differential Revision: https://reviews.llvm.org/D79219
2020-07-14 19:30:08 -07:00
Mircea Trofin 5918d49ac1 [llvm][NFC] Use llvm_canonicalize_cmake_booleans for LLVM_HAVE_TF_AOT
Reviewers: thakis

Subscribers: mgorny, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82776
2020-06-29 12:27:52 -07:00
Fangrui Song 2d7fdab8e3 [CMake] Change target 'check' from 'check-llvm' to 'check-all'
Reviewed By: echristo, mehdi_amini

Differential Revision: https://reviews.llvm.org/D80823
2020-05-29 14:15:27 -07:00
Martin Storsjö f8972662bc [examples] Skip building the Bye pass plugin on windows
Windows doesn't properly support pass plugins (as a shared library
can't have undefined references, which pass plugins assume, being
loaded into a host process that contains provides them), thus
disable building it and the corresponding test.

This matches what was done for the passes unit test in
bc8e442188.

Differential Revision: https://reviews.llvm.org/D79771
2020-05-13 13:40:56 +03:00
Nico Weber a16ba6fea2 Reland "Make it possible for lit.site.cfg to contain relative paths, and use it for llvm and clang"
The problem on Windows was that the \b in "..\bin" was interpreted
as an escape sequence. Use r"" strings to prevent that.

This reverts commit ab11b9eefa,
with raw strings in the lit.site.cfg.py.in files.

Differential Revision: https://reviews.llvm.org/D77184
2020-04-02 16:12:03 -04:00
Nico Weber ab11b9eefa Revert "Make it possible for lit.site.cfg to contain relative paths, and use it for llvm and clang"
This reverts commit fb80b6b2d5 and
follow-up 631ee8b24a.

Seems to not work on Windows:
http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/31684
http://lab.llvm.org:8011/builders/llvm-clang-win-x-aarch64/builds/6512

Let's revert while I investigate.
2020-04-02 15:00:09 -04:00
Nico Weber fb80b6b2d5 Make it possible for lit.site.cfg to contain relative paths, and use it for llvm and clang
Currently, all generated lit.site.cfg files contain absolute paths.

This makes it impossible to build on one machine, and then transfer the
build output to another machine for test execution. Being able to do
this is useful for several use cases:

1. When running tests on an ARM machine, it would be possible to build
   on a fast x86 machine and then copy build artifacts over after building.

2. It allows running several test suites (clang, llvm, lld) on 3
   different machines, reducing test time from sum(each test suite time) to
   max(each test suite time).

This patch makes it possible to pass a list of variables that should be
relative in the generated lit.site.cfg.py file to
configure_lit_site_cfg(). The lit.site.cfg.py.in file needs to call
`path()` on these variables, so that the paths are converted to absolute
form at lit start time.

The testers would have to have an LLVM checkout at the same revision,
and the build dir would have to be at the same relative path as on the
builder.

This does not yet cover how to figure out which files to copy from the
builder machine to the tester machines. (One idea is to look at the
`--graphviz=test.dot` output and copy all inputs of the `check-llvm`
target.)

Differential Revision: https://reviews.llvm.org/D77184
2020-04-02 13:53:16 -04:00
Hans Wennborg 916be8fd6a Revert abb00753 "build: reduce CMake handling for zlib" (PR44780)
and follow-ups:
a2ca1c2d "build: disable zlib by default on Windows"
2181bf40 "[CMake] Link against ZLIB::ZLIB"
1079c68a "Attempt to fix ZLIB CMake logic on Windows"

This changed the output of llvm-config --system-libs, and more
importantly it broke stand-alone builds. Instead of piling on more fix
attempts, let's revert this to reduce the risk of more breakages.
2020-03-03 11:03:09 +01:00
Greg Clayton e4af56db27 Fix buildbots after recent GSYM commit.
Added llvm-gsymutil to LLVM_TEST_DEPENDS.
2020-02-26 10:30:04 -08:00
Peter Collingbourne 0414c56940 Revert "Rework go bindings so that validation works fine"
And add llvm-go back to the test dependencies.

No longer necessary now that llvm-go has been brought back.

This reverts commit e8f8873da5.
2020-02-24 09:20:08 -08:00
Fangrui Song 04b4866ba4 [CMake] Delete llvm_add_go_executable and a reference to TARGET llvm-go
llvm-go was deleted by 102814b4d3.
2020-02-11 20:55:50 -08:00
Jonas Devlieghere c10b9f0bde [CMake] Fix accidentally inverted condition
I unintentionally inverted the condition for excluding the tests from
check-all.
2020-02-07 15:17:25 -08:00
Jonas Devlieghere 4fe839ef3a [CMake] Rename EXCLUDE_FROM_ALL and make it an argument to add_lit_testsuite
EXCLUDE_FROM_ALL means something else for add_lit_testsuite as it does
for something like add_executable. Distinguish between the two by
renaming the variable and making it an argument to add_lit_testsuite.

Differential revision: https://reviews.llvm.org/D74168
2020-02-06 15:33:18 -08:00
Eric Astor 5f6dfa800e [ms] [llvm-ml] Add placeholder for llvm-ml, based on llvm-mc
As discussed on the mailing list, I plan to introduce an ml-compatible MASM assembler as part of providing more of the Windows build tools. This will be similar to llvm-mc, but with different command-line parameters.

This placeholder is purely a stripped-down version of llvm-mc; we'll eventually add support for the Microsoft-style command-line flags, and back it with a MASM parser.

Relanding this revision after fixing ARM-compatibility issues.

Reviewers: rnk, thakis, RKSimon

Reviewed By: thakis, RKSimon

Differential Revision: https://reviews.llvm.org/D72679
2020-01-20 09:19:10 -05:00
Eric Astor 0eeddf1ac5 Revert "[ms] [llvm-ml] Add placeholder for llvm-ml, based on llvm-mc"
This reverts commit 22af2cbefc, due to breakages on ARM platforms.
2020-01-18 09:51:40 -05:00
Eric Astor 22af2cbefc [ms] [llvm-ml] Add placeholder for llvm-ml, based on llvm-mc
Summary:
As discussed on the mailing list, I plan to introduce an ml-compatible MASM assembler as part of providing more of the Windows build tools. This will be similar to llvm-mc, but with different command-line parameters.

This placeholder is purely a stripped-down version of llvm-mc; we'll eventually add support for the Microsoft-style command-line flags, and back it with a MASM parser.

Reviewers: rnk, thakis

Reviewed By: thakis

Subscribers: merge_guards_bot, mgorny, jfb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D72679
2020-01-17 16:14:08 -05:00
serge-sans-paille dfadb74f25 Use llvm_canonicalize_cmake_booleans where intended
Differential Revision: https://reviews.llvm.org/D72130
2020-01-03 15:42:35 +01:00
serge-sans-paille b2be259fa9 Fix compiler extension testing
Correctly declare example dependency. Pipe stderr through FileCheck.

Differential Revision: https://reviews.llvm.org/D72130
2020-01-03 15:42:35 +01:00
Saleem Abdulrasool abb0075306 build: reduce CMake handling for zlib
Rather than handling zlib handling manually, use `find_package` from CMake
to find zlib properly. Use this to normalize the `LLVM_ENABLE_ZLIB`,
`HAVE_ZLIB`, `HAVE_ZLIB_H`. Furthermore, require zlib if `LLVM_ENABLE_ZLIB` is
set to `YES`, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.

This restores 68a235d07f,
e6c7ed6d21.  The problem with the windows
bot is a need for clearing the cache.
2020-01-02 11:19:12 -08:00
James Henderson e406cca5f9 Revert "build: reduce CMake handling for zlib"
This reverts commit 68a235d07f.

This commit broke the clang-x64-windows-msvc build bot and a follow-up
commit did not fix it. Reverting to fix the bot.
2020-01-02 16:02:10 +00:00
Saleem Abdulrasool 68a235d07f build: reduce CMake handling for zlib
Rather than handling zlib handling manually, use `find_package` from CMake
to find zlib properly. Use this to normalize the `LLVM_ENABLE_ZLIB`,
`HAVE_ZLIB`, `HAVE_ZLIB_H`. Furthermore, require zlib if `LLVM_ENABLE_ZLIB` is
set to `YES`, which requires the distributor to explicitly select whether
zlib is enabled or not. This simplifies the CMake handling and usage in
the rest of the tooling.
2020-01-01 16:36:59 -08:00