16:56:55 /mnt/build/workspace/root-pullrequests-build/root/builtins/zlib/adler32_cf.c:396:7: warning: ‘ifunc’ resolver for ‘adler32’ should return ‘uLong (*)(uLong,  const Bytef *, uInt)’ {aka ‘long unsigned int (*)(long unsigned int,  const unsigned char *, unsigned int)’} [-Wattribute-alias]
16:56:55  void *resolve_adler32(void)
16:56:55        ^~~~~~~~~~~~~~~
16:56:55 /mnt/build/workspace/root-pullrequests-build/root/builtins/zlib/adler32_cf.c:424:15: note: resolver indirect function declared here
16:56:55  uLong ZEXPORT adler32(uLong adler, const Bytef *buf, uInt len)  __attribute__ ((ifunc ("resolve_adler32")));

Using various CRC32 calculation techniques and algorithms didn't allow
 to achieve required compression ratio(to be investigated after).

This reverts commit 83e5d9f45c76914118501652e0c53ff56793fefe.

ROOT has conflicting license with crc32-pclmul_asm.S

This reverts commit b9026f695e4aa44e17e8a7efc6d8becd9351846b.

It help to solve a problem of correct handling of zlib compilation on SL6

This reverts commit b2591cc07aad680b5235670931ba496e94208034.

This reverts commit a7d16eef0bb19b74326d4593a4f0900dd508150a.

This reverts commit 2efc577271c7c52a8f2f800207dfdc42003d64a6.

The implementation of target attribute is using the STT_GNU_IFUNC symbol type, disabling its usage in zlib for Mac

This reverts commit 2569539bfbb0d552532f0afb7c5618daec228041.

This reverts commit 360cf5f1f262df524f3636f6a953ae4ddec59f81.

It support now more compilation cases (x86_64[SIMD/nonSIMD], Aarch64[Neon/CRC32], Windows)

This reverts commit 81f13d55f564f8a25e5d01ca04527af96c97f270.

It fix issues with Windows compilation

This reverts commit 9db55fc27131048d1e7aba9ac4fb0f1bd878d1c7.

This reverts commit ea5fea2ff4f68186e13c64f08ddd2d79aaeb30a4.

This reverts commit fb91bf9d99d04881a216cc1f2ed8542fd70b6a4a.

This reverts commit 82e12164ebccd86e2efb114e5728fe14996f6c15.

Updating Zlib/Cloudflare/CMS-externals to latest version (SIMD), together with new updates from Cloudflare (support of aarch64 and MSVC)

This reverts commit 2557d0f59c664040e0e29d01164ba9960835cb52.

This allows us to use generator expressions for the
library name to also fix the build on Windows.

- Avoid installation of empty lib/pkgconfig directory
- Use PCRE_PCRE_LIBRARY and PCRE_PCREPOSIX_LIBRARY variables

Fixes: ROOT-9864

Needed for MSVC, since it does not understand -fvisibility=hidden.

In order to make sure that Davix picks up the same LibXml2 library for its
build that ROOT was configured to build against, added some additional
configuration arguments to the DAVIX target.

We need to provide a better match to what a call to
find_package(OpenSSL) gives, to make the builtin work
with CMake 3.9.

Revert "Updating Zlib/Cloudflare/CMS-externals to latest version (SIMD), together with new updates from Cloudflare (support of aarch64 and MSVC)"

This reverts commit c3bb0c282f6e8708bd42bb527ede2d5af53edb2b.

This reverts commit 7abae9cb4ea493c7e897e756689ccf0133bf15ed.

This reverts commit 8374c3c949c579e48c15575e804d314151fa25f9.

This reverts commit f028b5f5f85a4ebae9e69b9509a4ad9f55477707.

This reverts commit 5ed407d35cf205db7a648ccbecd15618f6a11ec0.

Revert "Refactoring deflate.c to support more compilation cases (x86_64[SIMD/nonSIMD], Aarch64[Neon/CRC32], Windows)"

This reverts commit cdb3ef83aeda1638b8f769a2d8be2693933ceb99.

This reverts commit 71116468507ddfa06264b4d4e83826a5f272ffc8.

Revert "Fixing compilation on Mac OS X: the implementation of target attribute is using the STT_GNU_IFUNC symbol type, disabling its usage in zlib for Mac"

This reverts commit 63345dab49441fdf6f9098ce797c7802816e6326.