diff options
Diffstat (limited to 'doc/manual.cli')
| -rw-r--r-- | doc/manual.cli | 93 |
1 files changed, 87 insertions, 6 deletions
diff --git a/doc/manual.cli b/doc/manual.cli index 7731609..f6541b9 100644 --- a/doc/manual.cli +++ b/doc/manual.cli @@ -8180,7 +8180,7 @@ be customized with the \c{extension} variable. \h#c-objc|Objective-C Compilation| -The \c{c} module provides the \c{c.objc} submodules which can be loaded in +The \c{c} module provides the \c{c.objc} submodule which can be loaded in order to register the \c{m{\}} target type and enable Objective-C compilation in the \c{C} compile rule. Note that \c{c.objc} must be loaded after the \c{c} module and while the \c{m{\}} target type is registered unconditionally, @@ -8209,14 +8209,12 @@ automatically link any necessary Objective-C runtime library (such as \h#c-as-cpp|Assembler with C Preprocessor Compilation| -The \c{c} module provides the \c{c.as-cpp} submodules which can be loaded in +The \c{c} module provides the \c{c.as-cpp} submodule which can be loaded in order to register the \c{S{\}} target type and enable Assembler with C Preprocessor compilation in the \c{C} compile rule. Note that \c{c.as-cpp} must be loaded after the \c{c} module and while the \c{S{\}} target type is registered unconditionally, compilation is only enabled if the C compiler -supports Assembler with C Preprocessor compilation. - -Typical usage: +supports Assembler with C Preprocessor compilation. Typical usage: \ # root.build @@ -8290,6 +8288,46 @@ if $assembler } \ +\h#c-predefs|C Compiler Predefined Macro Extraction| + +The \c{c} module provides the \c{c.predefs} submodule which can be loaded in +order to register a rule that generates a C header with predefined compiler +macros. Note that the \c{c.predefs} module must be loaded after the \c{c} +module and the rule will only match with an explicit rule hint. Typical usage: + +\ +# root.build +# +using c +using c.predefs +\ + +\ +# buildfile +# +[rule_hint=c.predefs] h{predefs}: +\ + +Note also that the MSVC compiler only supports the predefined macro extraction +starting from Visual Studio 2019 (16.0; \c{cl.exe} version 19.20). If support +for earlier versions is required, then you will need to provide a fallback +implementation appropriate for your project. For example: + +\ +[rule_hint=c.predefs] h{predefs}: +% update +if ($c.id == 'msvc' && \ + ($c.version.major < 19 || \ + ($c.version.major == 19 && $c.version.minor < 20))) +{{ + diag c-predefs $> + + cat <<EOF >$path($>) + #define _WIN32 + EOF +}} +\ + \h1#module-cxx|\c{cxx} Module| @@ -9984,7 +10022,7 @@ purviews. \h#cxx-objcxx|Objective-C++ Compilation| -The \c{cxx} module provides the \c{cxx.objcxx} submodules which can be loaded +The \c{cxx} module provides the \c{cxx.objcxx} submodule which can be loaded in order to register the \c{mm{\}} target type and enable Objective-C++ compilation in the \c{C++} compile rule. Note that \c{cxx.objcxx} must be loaded after the \c{cxx} module and while the \c{mm{\}} target type is @@ -10011,6 +10049,49 @@ made to automatically link any necessary Objective-C runtime library (such as \c{-lobjc}). +\h#cxx-predefs|C++ Compiler Predefined Macro Extraction| + +The \c{cxx} module provides the \c{cxx.predefs} submodule which can be loaded +in order to register a rule that generates a C++ header with predefined +compiler macros. Note that the \c{cxx.predefs} module must be loaded after the +\c{cxx} module and the rule will only match with an explicit rule +hint. Typical usage: + +\ +# root.build +# +using cxx +using cxx.predefs +\ + +\ +# buildfile +# +[rule_hint=cxx.predefs] hxx{predefs}: +\ + +Note also that the MSVC compiler only supports the predefined macro extraction +starting from Visual Studio 2019 (16.0; \c{cl.exe} version 19.20). If support +for earlier versions is required, then you will need to provide a fallback +implementation appropriate for your project. For example: + +\ +[rule_hint=cxx.predefs] hxx{predefs}: +% update +if ($cxx.id == 'msvc' && \ + ($cxx.version.major < 19 || \ + ($cxx.version.major == 19 && $cxx.version.minor < 20))) +{{ + diag c++-predefs $> + + cat <<EOF >$path($>) + #define _WIN32 + #define __cplusplus 201402L + EOF +}} +\ + + \h1#module-in|\c{in} Module| The \c{in} build system module provides support for \c{.in} (input) file |