freebsd-dev/lib/clang/Makefile.inc

# $FreeBSD$

.include <bsd.compiler.mk>

MK_PIE:=	no	# Explicit libXXX.a references

.if ${COMPILER_TYPE} == "clang"
DEBUG_FILES_CFLAGS= -gline-tables-only
.else
DEBUG_FILES_CFLAGS= -g1
.endif

WARNS?=		0
Improve the coverage of debug symbols for MK_DEBUG_FILES. - Include debug symbols in static libraries. This permits binaries to include debug symbols for functions obtained from static libraries. - Permit the C/C++ compiler flags added for MK_DEBUG_FILES to be overridden by setting DEBUG_FILES_CFLAGS. Use this to limit the debug information for llvm libraries and binaries. Reviewed by: emaste Sponsored by: DARPA / AFRL Differential Revision: https://reviews.freebsd.org/D12025 2017-08-23 23:30:25 +00:00			`# $FreeBSD$`

			`.include <bsd.compiler.mk>`

Add WITH_PIE knob to build Position Independent Executables Building binaries as PIE allows the executable itself to be loaded at a random address when ASLR is enabled (not just its shared libraries). With this change PIE objects have a .pieo extension and INTERNALLIB libraries libXXX_pie.a. MK_PIE is disabled for some kerberos5 tools, Clang, and Subversion, as they explicitly reference .a libraries in their Makefiles. These can be addressed on an individual basis later. MK_PIE is also disabled for rtld-elf because it is already position-independent using bespoke Makefile rules. Currently only dynamically linked binaries will be built as PIE. Discussed with: dim Reviewed by: kib MFC after: 1 month Relnotes: Yes Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D18423 2019-02-15 22:22:38 +00:00			`MK_PIE:= no # Explicit libXXX.a references`

Improve the coverage of debug symbols for MK_DEBUG_FILES. - Include debug symbols in static libraries. This permits binaries to include debug symbols for functions obtained from static libraries. - Permit the C/C++ compiler flags added for MK_DEBUG_FILES to be overridden by setting DEBUG_FILES_CFLAGS. Use this to limit the debug information for llvm libraries and binaries. Reviewed by: emaste Sponsored by: DARPA / AFRL Differential Revision: https://reviews.freebsd.org/D12025 2017-08-23 23:30:25 +00:00			`.if ${COMPILER_TYPE} == "clang"`
			`DEBUG_FILES_CFLAGS= -gline-tables-only`
			`.else`
			`DEBUG_FILES_CFLAGS= -g1`
			`.endif`
build: provide a default WARNS for all in-tree builds The current default is provided in various Makefile.inc in some top-level directories and covers a good portion of the tree, but doesn't cover parts of the build a little deeper (e.g. libcasper). Provide a default in src.sys.mk and set WARNS to it in bsd.sys.mk if that variable is defined. This lets us relatively cleanly provide a default WARNS no matter where you're building in the src tree without breaking things outside of the tree. Crunchgen has been updated as a bootstrap tool to work on this change because it needs r365605 at a minimum to succeed. The cleanup necessary to successfully walk over this change on WITHOUT_CLEAN builds has been added. There is a supplemental project to this to list all of the warnings that are encountered when the environment has WARNS=6 NO_WERROR=yes: https://warns.kevans.dev -- this project will hopefully eventually go away in favor of CI doing a much better job than it. Reviewed by: emaste, brooks, ngie (all earlier version) Reviewed by: emaste, arichardson (depend-cleanup.sh change) Differential Revision: https://reviews.freebsd.org/D26455 2020-09-18 17:17:46 +00:00
			`WARNS?= 0`