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freebsd-nq/share/mk/bsd.compiler.mk

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Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
# $FreeBSD$
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
# Setup variables for the compiler
#
Fix typos in comments and wrap to <80 columns MFC after: 3 days
2014-12-06 03:12:57 +00:00
# COMPILER_TYPE is the major type of compiler. Currently gcc and clang support
# automatic detection. Other compiler types can be shoe-horned in, but require
# explicit setting of the compiler type. The compiler type can also be set
# explicitly if, say, you install gcc as clang...
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
#
Fix typos in comments and wrap to <80 columns MFC after: 3 days
2014-12-06 03:12:57 +00:00
# COMPILER_VERSION is a numeric constant equal to:
# major * 10000 + minor * 100 + tiny
# It too can be overriden on the command line. When testing it, be sure to
# make sure that you are limiting the test to a specific compiler. Testing
# against 30300 for gcc likely isn't what you wanted (since versions of gcc
# prior to 4.2 likely have no prayer of working).
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
#
Fix typos in comments and wrap to <80 columns MFC after: 3 days
2014-12-06 03:12:57 +00:00
# COMPILER_FEATURES will contain one or more of the following, based on
# compiler support for that feature:
#
# - c++11 : supports full (or nearly full) C++11 programming environment.
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
#
# This file may be included multiple times, but only has effect the first time.
#
bsd.compiler.mk was implicitly included by bsd.own.mk in historical versions. With its movement to src.opts.mk, bsd.prog.mk was testing COMPILER_TYPE without including the bsd.compiler.mk anymore. In the source tree, this caused no problems, for reasons that aren't clear, but does cause problems outside of the source tree. Allow bsd.compiler.mk to be included multiple times safely, and always include bsd.compiler.mk at the top of bsd.prog.mk. Resist the urge to put it in bsd.init.mk, since that would reintroduce the implicit include.
2014-05-07 18:15:02 +00:00
.if !target(__<bsd.compiler.mk>__)
__<bsd.compiler.mk>__:
Pass COMPILER_TYPE and COMPILER_VERSION to sub-makes to avoid redundant lookups. This uses a special variable name based on a hash of ${CC}, ${PATH}, and ${MACHINE} to ensure that a cached value is not used if any of these values changes to use a new compiler. Before this there were 34,620 fork/exec from bsd.compiler.mk during a buildworld. After this there are 608. More improvement is needed to cache a value from the top-level before descending into subdirs in the various build phases. Reviewed by: brooks (earlier version) MFC after: 3 weeks Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D3898
2015-10-20 20:15:25 +00:00
# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make.
# The value is only used/exported for the same environment that impacts
# CC and COMPILER_* settings here.
_exported_vars= COMPILER_TYPE COMPILER_VERSION
_cc_hash= ${CC}${MACHINE}${PATH}
_cc_hash:= ${_cc_hash:hash}
Improve safety of caching from r289659 by only importing of none of the variables are already set. This should cover odd cases such as the COMPILER_TYPE override in lib/csu/powerpc64. X-MFC-With: r289659 MFC after: 3 weeks Sponsored by: EMC / Isilon Storage Division
2015-10-20 20:37:00 +00:00
# Only import if none of the vars are set somehow else.
_can_export= yes
.for var in ${_exported_vars}
.if defined(${var})
_can_export= no
.endif
.endfor
.if ${_can_export} == yes
Pass COMPILER_TYPE and COMPILER_VERSION to sub-makes to avoid redundant lookups. This uses a special variable name based on a hash of ${CC}, ${PATH}, and ${MACHINE} to ensure that a cached value is not used if any of these values changes to use a new compiler. Before this there were 34,620 fork/exec from bsd.compiler.mk during a buildworld. After this there are 608. More improvement is needed to cache a value from the top-level before descending into subdirs in the various build phases. Reviewed by: brooks (earlier version) MFC after: 3 weeks Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D3898
2015-10-20 20:15:25 +00:00
.for var in ${_exported_vars}
.if defined(${var}.${_cc_hash})
${var}= ${${var}.${_cc_hash}}
.endif
.endfor
Improve safety of caching from r289659 by only importing of none of the variables are already set. This should cover odd cases such as the COMPILER_TYPE override in lib/csu/powerpc64. X-MFC-With: r289659 MFC after: 3 weeks Sponsored by: EMC / Isilon Storage Division
2015-10-20 20:37:00 +00:00
.endif
Pass COMPILER_TYPE and COMPILER_VERSION to sub-makes to avoid redundant lookups. This uses a special variable name based on a hash of ${CC}, ${PATH}, and ${MACHINE} to ensure that a cached value is not used if any of these values changes to use a new compiler. Before this there were 34,620 fork/exec from bsd.compiler.mk during a buildworld. After this there are 608. More improvement is needed to cache a value from the top-level before descending into subdirs in the various build phases. Reviewed by: brooks (earlier version) MFC after: 3 weeks Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D3898
2015-10-20 20:15:25 +00:00
Avoid errors when MACHINE is a pseudo machine like "common".
2013-10-12 23:49:26 +00:00
.if ${MACHINE} == "common"
Mention what 'common' is for
2015-06-10 19:36:53 +00:00
# common is a pseudo machine for architecture independent
# generated files - thus there is no compiler.
Avoid errors when MACHINE is a pseudo machine like "common".
2013-10-12 23:49:26 +00:00
COMPILER_TYPE= none
Merge head from 7/28
2014-08-19 06:50:54 +00:00
COMPILER_VERSION= 0
Merge from head
2015-05-26 21:52:57 +00:00
.elif !defined(COMPILER_TYPE) || !defined(COMPILER_VERSION)
Don't hide stderr when checking ${CC} --version. This can have important debugging information such as 'cc: not found' or 'ccache: error: Could not find compiler "cc" in PATH'. MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division
2015-10-31 02:07:30 +00:00
_v!= ${CC} --version || echo 0.0.0
Avoid errors when MACHINE is a pseudo machine like "common".
2013-10-12 23:49:26 +00:00
Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
.if !defined(COMPILER_TYPE)
Allow CC to not actually exist. During the ports INDEX run, all the Makefiles are evaluated without building things. In a normal build, the prerequisites would be built, and CC would be an actual thing. In an INDEX build, though, they don't exists. Redirect stderr to get rid of annoying messages, and assume that the compiler version is 0 if the actual compiler can't tell us. Do this in preference to guessing based on numbers because gcc410 might be 4.10, or 4.1.0 and without carefully crafted special knowledge we differentiate between them easily (also ming-gcc has no clues at all). Elsewhere, don't trust the compiler version if it is 0.
2014-05-23 14:34:22 +00:00
. if ${CC:T:M*gcc*}
Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
COMPILER_TYPE:= gcc
Allow CC to not actually exist. During the ports INDEX run, all the Makefiles are evaluated without building things. In a normal build, the prerequisites would be built, and CC would be an actual thing. In an INDEX build, though, they don't exists. Redirect stderr to get rid of annoying messages, and assume that the compiler version is 0 if the actual compiler can't tell us. Do this in preference to guessing based on numbers because gcc410 might be 4.10, or 4.1.0 and without carefully crafted special knowledge we differentiate between them easily (also ming-gcc has no clues at all). Elsewhere, don't trust the compiler version if it is 0.
2014-05-23 14:34:22 +00:00
. elif ${CC:T:M*clang*}
Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
COMPILER_TYPE:= clang
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
. elif ${_v:Mgcc}
Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
COMPILER_TYPE:= gcc
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
. elif ${_v:M\(GCC\)}
Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
COMPILER_TYPE:= gcc
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
. elif ${_v:Mclang}
Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
COMPILER_TYPE:= clang
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
. else
Provide slightly more helpful feedback when we can't figure out what compiler the user is using. PR: misc/173914
2013-03-01 03:25:43 +00:00
.error Unable to determine compiler type for ${CC}. Consider setting COMPILER_TYPE.
Introduce a new make variable COMPILER_TYPE that specifies what type of compiler is being used (currently clang or gcc). COMPILER_TYPE is set in the new bsd.compiler.mk file based on the value of the CC variable or, should it prove informative, by running ${CC} --version and examining the output. To avoid negative performance impacts in the default case and correct value for COMPILER_TYPE type is determined and passed in the environment of submake instances while building world. Replace adhoc attempts at determining the compiler type by examining CC or MK_CLANG_IS_CC with checks of COMPILER_TYPE. This eliminates bootstrapping complications when first setting WITH_CLANG_IS_CC. Sponsored by: DARPA, AFRL Reviewed by: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp>, imp, linimon (with some modifications post review) MFC after: 2 weeks
2012-09-13 16:00:46 +00:00
. endif
.endif
Support, to the extent we generate proper command lines, compiling with clang 3.3. Useful for test building -current on a -stable system in individual directories. Potentially useful if we ever want to support, say, gcc 4.8 or 4.9's new warnings when building with an external toolchain (but such support not yet committed). Document the bsd.compiler.mk interface.
2014-05-10 16:37:44 +00:00
.if !defined(COMPILER_VERSION)
COMPILER_VERSION!=echo ${_v:M[1-9].[0-9]*} | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
.endif
.undef _v
${CC} --version doesn't need to be queried if both COMPILER_TYPE and COMPILER_VERSION are known
2014-12-06 04:02:56 +00:00
.endif
Add a COMPILER_FEATURES variable that is set in bsd.compiler.mk. When the compiler is clang add c++11 to COMPILER_FEATURES. When the compiler supports c++11, default to building libc++. This will not impact the compliation of programs, but will make it easier for users with clang compiled systems to test libc++ by passing -stdlib=libc++ to their c++ compliations.
2012-09-26 17:25:15 +00:00
Pass COMPILER_TYPE and COMPILER_VERSION to sub-makes to avoid redundant lookups. This uses a special variable name based on a hash of ${CC}, ${PATH}, and ${MACHINE} to ensure that a cached value is not used if any of these values changes to use a new compiler. Before this there were 34,620 fork/exec from bsd.compiler.mk during a buildworld. After this there are 608. More improvement is needed to cache a value from the top-level before descending into subdirs in the various build phases. Reviewed by: brooks (earlier version) MFC after: 3 weeks Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D3898
2015-10-20 20:15:25 +00:00
# Export the values so sub-makes don't have to look them up again, using the
# hash key computed above.
.for var in ${_exported_vars}
${var}.${_cc_hash}:= ${${var}}
.export-env ${var}.${_cc_hash}
.undef ${var}.${_cc_hash}
.endfor
When using an external toolchain note that gcc 4.8+ supports C++11 Submitted by: imp
2014-10-21 19:58:23 +00:00
.if ${COMPILER_TYPE} == "clang" || \
(${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 40800)
Add a COMPILER_FEATURES variable that is set in bsd.compiler.mk. When the compiler is clang add c++11 to COMPILER_FEATURES. When the compiler supports c++11, default to building libc++. This will not impact the compliation of programs, but will make it easier for users with clang compiled systems to test libc++ by passing -stdlib=libc++ to their c++ compliations.
2012-09-26 17:25:15 +00:00
COMPILER_FEATURES= c++11
.else
COMPILER_FEATURES=
.endif
bsd.compiler.mk was implicitly included by bsd.own.mk in historical versions. With its movement to src.opts.mk, bsd.prog.mk was testing COMPILER_TYPE without including the bsd.compiler.mk anymore. In the source tree, this caused no problems, for reasons that aren't clear, but does cause problems outside of the source tree. Allow bsd.compiler.mk to be included multiple times safely, and always include bsd.compiler.mk at the top of bsd.prog.mk. Resist the urge to put it in bsd.init.mk, since that would reintroduce the implicit include.
2014-05-07 18:15:02 +00:00
.endif # !target(__<bsd.compiler.mk>__)
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