audk/BaseTools
Laszlo Ersek cbf00651ed BaseTools/tools_def: add "-fno-unwind-tables" to GCC_AARCH64_CC_FLAGS
The ElfConvert routines in GenFw don't handle the ".eh_frame" ELF section
emitted by gcc. For this reason, Leif disabled the generation of that
section for AARCH64 with "-fno-asynchronous-unwind-tables" in commit
28e80befa4 [1], and Ard did the same for IA32 and X64 in commit
26ecc55c02 [2]. (The CLANG38 toolchain received the same flag at its
inception, in commit 6f756db5ea [3].)

However, ".eh_frame" is back now; in upstream gcc commit 9cbee213b579 [4]
(part of tag "gcc-8_1_0-release"), both "-fasynchronous-unwind-tables" and
"-funwind-tables" were made the default for AARCH64. (The patch author
described the effects on the gcc mailing list [5].) We have to counter the
latter flag with "-fno-unwind-tables", otherwise GenFw chokes on
".eh_frame" again (triggered for example on Fedora 28).

"-f[no-]unwind-tables" goes back to at least gcc-4.4 [6], so it's safe to
add to GCC_AARCH64_CC_FLAGS.

[1] https://github.com/tianocore/edk2/commit/28e80befa4fe
[2] https://github.com/tianocore/edk2/commit/26ecc55c027d
[3] https://github.com/tianocore/edk2/commit/6f756db5ea05
[4] https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=9cbee213b579
[5] http://mid.mail-archive.com/7b28c03a-c032-6cec-c127-1c12cbe98eeb@foss.arm.com
[6] https://gcc.gnu.org/onlinedocs/gcc-4.4.7/gcc/Code-Gen-Options.html

Cc: "Danilo C. L. de Paula" <ddepaula@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Cole Robinson <crobinso@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Reported-by: "Danilo C. L. de Paula" <ddepaula@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>
2018-05-23 16:54:18 +02:00
..
Bin BaseTools: Improve LzmaF86Compress wrapper 2016-01-20 05:15:55 +00:00
BinWrappers BaseTools/PosixLike: honor pre-set PYTHONPATH 2018-03-21 15:53:44 +01:00
Conf BaseTools/tools_def: add "-fno-unwind-tables" to GCC_AARCH64_CC_FLAGS 2018-05-23 16:54:18 +02:00
Scripts BaseTools: refactor and remove out of date use of .keys() 2018-04-10 10:05:16 +08:00
Source BaseTools/Workspace: Fix ValueChain set 2018-05-23 13:17:51 +08:00
Tests BaseTools: Use python2 if available in Tests/GNUmakefile 2016-01-20 05:14:10 +00:00
UserManuals BaseTools/UPT: Man Page Update 2017-03-09 15:06:15 +08:00
gcc Sync BaseTools Branch (version r2321) to EDKII main trunk. 2011-09-18 12:17:25 +00:00
.gitignore BaseTools gitignore: Ignore VS intermediate files *.obj and *.pdb 2016-11-18 11:07:46 +08:00
BuildEnv BaseTools/BuildEnv: override "set -C" (noclobber) in sourcing shell env 2017-10-18 11:34:03 +02:00
BuildNotes.txt BaseTools: Updated BuildNotes URLs 2016-03-25 09:46:44 +08:00
GNUmakefile BaseTools: Update BaseTools top GNUMakefile with the clear dependency 2017-11-30 13:06:49 +08:00
Makefile BaseTools: Update top VS Makefile with the absolute path 2017-02-06 10:35:28 +08:00
ReadMe.txt BaseTools: Correct ReadMe.txt file with CRLF line ending 2016-07-29 09:18:11 +08:00
building-gcc.txt Sync BaseTool trunk (version r2649) into EDKII BaseTools. 2014-01-27 05:23:15 +00:00
get_vsvars.bat BaseTools: Update VS batch file to auto detect VS2017 2017-11-29 16:03:12 +08:00
set_vsprefix_envs.bat BaseTools: Update VS batch file to auto detect VS2017 2017-11-29 16:03:12 +08:00
toolsetup.bat BaseTools: Add WindowsLike path in front of PATH Env 2018-02-23 16:57:32 +08:00

ReadMe.txt

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This directory contains the next generation of EDK II build tools and template files.
Templates are located in the Conf directory, while the tools executables for
Microsoft Windows 32-bit Operating Systems are located in the Bin\Win32 directory, other 
directory contatins tools source.

1. Build step to generate the binary tools.

=== Windows/Visual Studio Notes ===

To build the BaseTools, you should run the standard vsvars32.bat script
from your preferred Visual Studio installation or you can run get_vsvars.bat
to use latest automatically detected version.

In addition to this, you should set the following environment variables:

 * EDK_TOOLS_PATH - Path to the BaseTools sub directory under the edk2 tree
 * BASE_TOOLS_PATH - The directory where the BaseTools source is located.
   (It is the same directory where this README.txt is located.)
 * PYTHON_FREEZER_PATH - Path to where the python freezer tool is installed

After this, you can run the toolsetup.bat file, which is in the same
directory as this file.  It should setup the remainder of the environment,
and build the tools if necessary.

Please also refer to the 'BuildNotes.txt' file for more information on
building under Windows.

=== Unix-like operating systems ===

To build on Unix-like operating systems, you only need to type 'make' in
the base directory of the project.

=== Ubuntu Notes ===

On Ubuntu, the following command should install all the necessary build
packages to build all the C BaseTools:

  sudo apt-get install build-essential uuid-dev

=== Python sqlite3 module ===
On Windows, the cx_freeze will not copy the sqlite3.dll to the frozen 
binary directory (the same directory as build.exe and GenFds.exe). 
Please copy it manually from <PythonHome>\DLLs.

The Python distributed with most recent Linux will have sqlite3 module
built in. If not, please install sqlit3 package separately.

26-OCT-2011