diff options
Diffstat (limited to 'doc/manual.cli')
| -rw-r--r-- | doc/manual.cli | 62 |
1 files changed, 40 insertions, 22 deletions
diff --git a/doc/manual.cli b/doc/manual.cli index 5b54882..dd449ce 100644 --- a/doc/manual.cli +++ b/doc/manual.cli @@ -775,15 +775,22 @@ hello/ inclusion scheme where each header is prefixed with its project name. It also has a predictable name where users can expect to find our project's source code. Finally, this layout prevents clutter in the project's root directory -which usually contains various other files. See \l{intro#structure-canonical -Canonical Project Structure} for more information. +which usually contains various other files. See \l{intro#proj-struct Canonical +Project Structure} for details. + +Note, however, that this layout is not mandatory and \c{build2} is flexible +enough to support various arrangements used in today's C and C++ projects. +Furthermore, the \l{bdep-new(1)} command provides a number of customization +options and chances are you will be able to create your preferred layout +automatically. See \l{bdep-new.xhtml#src-layout SOURCE LAYOUT} for more +information and examples. Note also that while we can name our header and source files however we like -(but, again, see \l{intro#structure-canonical Canonical Project Structure} for -some sensible guidelines), C++ module interface files need to embed a -sufficient amount of the module name suffix in their names to unambiguously -resolve all the modules within a project. See \l{#cxx-modules-build -Building Modules} for details.| +(but, again, see \l{intro#proj-struct Canonical Project Structure} for some +sensible guidelines), C++ module interface files need to embed a sufficient +amount of the module name suffix in their names to unambiguously resolve all +the modules within a project. See \l{#cxx-modules-build Building Modules} for +details.| The source subdirectory \c{buildfile} is identical to the simple project's minus the parts moved to \c{root.build}: @@ -854,7 +861,7 @@ Speaking of libraries, let's see what the standard project structure looks like for one, using \c{libhello} created by \l{bdep-new(1)} as an example: \ -$ bdep new --no-init -t lib libhello +$ bdep new --no-init -l c++ -t lib libhello $ tree libhello/ libhello/ @@ -883,6 +890,17 @@ contents of the project's source subdirectory, \c{libhello/}, look quite a bit different. We will examine all of these differences in the coming sections, as we learn more about the build system. +\N|Again, this layout is not mandatory and \l{bdep-new(1)} can create a number +of alternative library structures. For example, if you prefer the +\c{include/src} split, try: + +\ +$ bdep new --no-init -l c++ -t lib,split libhello +\ + +See \l{bdep-new.xhtml#src-layout SOURCE LAYOUT} for more examples.| + + \N|The standard project structure is not type (executable, library, etc) or even language specific. In fact, the same project can contain multiple executables and/or libraries (for example, both \c{hello} and \c{libhello}). @@ -1356,9 +1374,9 @@ values end up in the \c{=+} and \c{+=} results is to imagine the new value taking the position of \c{=} and the existing value \- of \c{+}.| The above \c{buildfile} allows us to include our headers using the project's -name as a prefix, inline with the \l{intro#structure-canonical Canonical -Project Structure} guidelines. For example, if we added the \c{utility.hxx} -header to our \c{hello} project, we would include it like this: +name as a prefix, inline with the \l{intro#proj-struct Canonical Project +Structure} guidelines. For example, if we added the \c{utility.hxx} header to +our \c{hello} project, we would include it like this: \ #include <iostream> @@ -2716,11 +2734,11 @@ covered in the source subdirectory \c{buildfile} in \c{libhello}. Here it is in its entirety: \ -int_libs = # Interface dependencies. -imp_libs = # Implementation dependencies. +intf_libs = # Interface dependencies. +impl_libs = # Implementation dependencies. lib{hello}: {hxx ixx txx cxx}{** -version} hxx{version} \ - $imp_libs $int_libs + $impl_libs $intf_libs # Include the generated version header into the distribution (so that # we don't pick up an installed one) and don't remove it when cleaning @@ -2744,7 +2762,7 @@ objs{*}: cxx.poptions += -DLIBHELLO_SHARED_BUILD lib{hello}: { cxx.export.poptions = \"-I$out_root\" \"-I$src_root\" - cxx.export.libs = $int_libs + cxx.export.libs = $intf_libs } liba{hello}: cxx.export.poptions += -DLIBHELLO_STATIC @@ -2788,15 +2806,15 @@ Here are the parts relevant to the library metadata protocol in the above \c{buildfile}: \ -int_libs = # Interface dependencies. -imp_libs = # Implementation dependencies. +intf_libs = # Interface dependencies. +impl_libs = # Implementation dependencies. -lib{hello}: ... $imp_libs $int_libs +lib{hello}: ... $impl_libs $intf_libs lib{hello}: { cxx.export.poptions = \"-I$out_root\" \"-I$src_root\" - cxx.export.libs = $int_libs + cxx.export.libs = $intf_libs } liba{hello}: cxx.export.poptions += -DLIBHELLO_STATIC @@ -2853,8 +2871,8 @@ can safely treat it as an implementation dependency. The corresponding \c{import} directives in our \c{buildfile} will therefore look like this: \ -import int_libs = libformat%lib{format} -import imp_libs = libprint%lib{print} +import intf_libs = libformat%lib{format} +import impl_libs = libprint%lib{print} \ The preprocessor options (\c{poptions}) of an interface dependency must be @@ -2865,7 +2883,7 @@ listing the interface dependencies in the \c{cxx.export.libs} variable: \ lib{hello}: { - cxx.export.libs = $int_libs + cxx.export.libs = $intf_libs } \ |