mirror of
https://github.com/openssl/openssl.git
synced 2024-12-03 05:41:46 +08:00
473a954771
Reviewed-by: Rich Salz <rsalz@openssl.org> (Merged from https://github.com/openssl/openssl/pull/1889)
655 lines
26 KiB
Plaintext
655 lines
26 KiB
Plaintext
Design document for the unified scheme data
|
|
===========================================
|
|
|
|
How are things connected?
|
|
-------------------------
|
|
|
|
The unified scheme takes all its data from the build.info files seen
|
|
throughout the source tree. These files hold the minimum information
|
|
needed to build end product files from diverse sources. See the
|
|
section on build.info files below.
|
|
|
|
From the information in build.info files, Configure builds up an
|
|
information database as a hash table called %unified_info, which is
|
|
stored in configdata.pm, found at the top of the build tree (which may
|
|
or may not be the same as the source tree).
|
|
|
|
Configurations/common.tmpl uses the data from %unified_info to
|
|
generate the rules for building end product files as well as
|
|
intermediary files with the help of a few functions found in the
|
|
build-file templates. See the section on build-file templates further
|
|
down for more information.
|
|
|
|
build.info files
|
|
----------------
|
|
|
|
As mentioned earlier, build.info files are meant to hold the minimum
|
|
information needed to build output files, and therefore only (with a
|
|
few possible exceptions [1]) have information about end products (such
|
|
as scripts, library files and programs) and source files (such as C
|
|
files, C header files, assembler files, etc). Intermediate files such
|
|
as object files are rarely directly referred to in build.info files (and
|
|
when they are, it's always with the file name extension .o), they are
|
|
inferred by Configure. By the same rule of minimalism, end product
|
|
file name extensions (such as .so, .a, .exe, etc) are never mentioned
|
|
in build.info. Their file name extensions will be inferred by the
|
|
build-file templates, adapted for the platform they are meant for (see
|
|
sections on %unified_info and build-file templates further down).
|
|
|
|
The variables PROGRAMS, LIBS, ENGINES and SCRIPTS are used to declare
|
|
end products. There are variants for them with '_NO_INST' as suffix
|
|
(PROGRAM_NO_INST etc) to specify end products that shouldn't get
|
|
installed.
|
|
|
|
The variables SOURCE, DEPEND, INCLUDE and ORDINALS are indexed by a
|
|
produced file, and their values are the source used to produce that
|
|
particular produced file, extra dependencies, include directories
|
|
needed, and ordinal files (explained further below.
|
|
|
|
All their values in all the build.info throughout the source tree are
|
|
collected together and form a set of programs, libraries, engines and
|
|
scripts to be produced, source files, dependencies, etc etc etc.
|
|
|
|
Let's have a pretend example, a very limited contraption of OpenSSL,
|
|
composed of the program 'apps/openssl', the libraries 'libssl' and
|
|
'libcrypto', an engine 'engines/ossltest' and their sources and
|
|
dependencies.
|
|
|
|
# build.info
|
|
LIBS=libcrypto libssl
|
|
ORDINALS[libcrypto]=crypto
|
|
ORDINALS[libssl]=ssl
|
|
INCLUDE[libcrypto]=include
|
|
INCLUDE[libssl]=include
|
|
DEPEND[libssl]=libcrypto
|
|
|
|
This is the top directory build.info file, and it tells us that two
|
|
libraries are to be built, there are some ordinals to be used to
|
|
declare what symbols in those libraries are seen as public, the
|
|
include directory 'include/' shall be used throughout when building
|
|
anything that will end up in each library, and that the library
|
|
'libssl' depend on the library 'libcrypto' to function properly.
|
|
|
|
# apps/build.info
|
|
PROGRAMS=openssl
|
|
SOURCE[openssl]=openssl.c
|
|
INCLUDE[openssl]=.. ../include
|
|
DEPEND[openssl]=../libssl
|
|
|
|
This is the build.info file in 'apps/', one may notice that all file
|
|
paths mentioned are relative to the directory the build.info file is
|
|
located in. This one tells us that there's a program to be built
|
|
called 'apps/openssl' (the file name extension will depend on the
|
|
platform and is therefore not mentioned in the build.info file). It's
|
|
built from one source file, 'apps/openssl.c', and building it requires
|
|
the use of '.' and 'include' include directories (both are declared
|
|
from the point of view of the 'apps/' directory), and that the program
|
|
depends on the library 'libssl' to function properly.
|
|
|
|
# crypto/build.info
|
|
LIBS=../libcrypto
|
|
SOURCE[../libcrypto]=aes.c evp.c cversion.c
|
|
DEPEND[cversion.o]=buildinf.h
|
|
|
|
GENERATE[buildinf.h]=../util/mkbuildinf.pl "$(CC) $(CFLAGS)" "$(PLATFORM)"
|
|
DEPEND[buildinf.h]=../Makefile
|
|
DEPEND[../util/mkbuildinf.pl]=../util/Foo.pm
|
|
|
|
This is the build.info file in 'crypto', and it tells us a little more
|
|
about what's needed to produce 'libcrypto'. LIBS is used again to
|
|
declare that 'libcrypto' is to be produced. This declaration is
|
|
really unnecessary as it's already mentioned in the top build.info
|
|
file, but can make the info file easier to understand. This is to
|
|
show that duplicate information isn't an issue.
|
|
|
|
This build.info file informs us that 'libcrypto' is built from a few
|
|
source files, 'crypto/aes.c', 'crypto/evp.c' and 'crypto/cversion.c'.
|
|
It also shows us that building the object file inferred from
|
|
'crypto/cversion.c' depends on 'crypto/buildinf.h'. Finally, it
|
|
also shows the possibility to declare how some files are generated
|
|
using some script, in this case a perl script, and how such scripts
|
|
can be declared to depend on other files, in this case a perl module.
|
|
|
|
Two things are worth an extra note:
|
|
|
|
'DEPEND[cversion.o]' mentions an object file. DEPEND indexes is the
|
|
only location where it's valid to mention them
|
|
|
|
Lines in 'BEGINRAW'..'ENDRAW' sections must always mention files as
|
|
seen from the top directory, no exception.
|
|
|
|
# ssl/build.info
|
|
LIBS=../libssl
|
|
SOURCE[../libssl]=tls.c
|
|
|
|
This is the build.info file in 'ssl/', and it tells us that the
|
|
library 'libssl' is built from the source file 'ssl/tls.c'.
|
|
|
|
# engines/build.info
|
|
ENGINES=dasync
|
|
SOURCE[dasync]=e_dasync.c
|
|
DEPEND[dasync]=../libcrypto
|
|
INCLUDE[dasync]=../include
|
|
|
|
ENGINES_NO_INST=ossltest
|
|
SOURCE[ossltest]=e_ossltest.c
|
|
DEPEND[ossltest]=../libcrypto.a
|
|
INCLUDE[ossltest]=../include
|
|
|
|
This is the build.info file in 'engines/', telling us that two engines
|
|
called 'engines/dasync' and 'engines/ossltest' shall be built, that
|
|
dasync's source is 'engines/e_dasync.c' and ossltest's source is
|
|
'engines/e_ossltest.c' and that the include directory 'include/' may
|
|
be used when building anything that will be part of these engines.
|
|
Also, both engines depend on the library 'libcrypto' to function
|
|
properly. ossltest is explicitly linked with the static variant of
|
|
the library 'libcrypto'. Finally, only dasync is being installed, as
|
|
ossltest is only for internal testing.
|
|
|
|
When Configure digests these build.info files, the accumulated
|
|
information comes down to this:
|
|
|
|
LIBS=libcrypto libssl
|
|
ORDINALS[libcrypto]=crypto
|
|
SOURCE[libcrypto]=crypto/aes.c crypto/evp.c crypto/cversion.c
|
|
DEPEND[crypto/cversion.o]=crypto/buildinf.h
|
|
INCLUDE[libcrypto]=include
|
|
ORDINALS[libssl]=ssl
|
|
SOURCE[libssl]=ssl/tls.c
|
|
INCLUDE[libssl]=include
|
|
DEPEND[libssl]=libcrypto
|
|
|
|
PROGRAMS=apps/openssl
|
|
SOURCE[apps/openssl]=apps/openssl.c
|
|
INCLUDE[apps/openssl]=. include
|
|
DEPEND[apps/openssl]=libssl
|
|
|
|
ENGINES=engines/dasync
|
|
SOURCE[engines/dasync]=engines/e_dasync.c
|
|
DEPEND[engines/dasync]=libcrypto
|
|
INCLUDE[engines/dasync]=include
|
|
|
|
ENGINES_NO_INST=engines/ossltest
|
|
SOURCE[engines/ossltest]=engines/e_ossltest.c
|
|
DEPEND[engines/ossltest]=libcrypto.a
|
|
INCLUDE[engines/ossltest]=include
|
|
|
|
GENERATE[crypto/buildinf.h]=util/mkbuildinf.pl "$(CC) $(CFLAGS)" "$(PLATFORM)"
|
|
DEPEND[crypto/buildinf.h]=Makefile
|
|
DEPEND[util/mkbuildinf.pl]=util/Foo.pm
|
|
|
|
|
|
A few notes worth mentioning:
|
|
|
|
LIBS may be used to declare routine libraries only.
|
|
|
|
PROGRAMS may be used to declare programs only.
|
|
|
|
ENGINES may be used to declare engines only.
|
|
|
|
The indexes for SOURCE and ORDINALS must only be end product files,
|
|
such as libraries, programs or engines. The values of SOURCE
|
|
variables must only be source files (possibly generated)
|
|
|
|
INCLUDE and DEPEND shows a relationship between different files
|
|
(usually produced files) or between files and directories, such as a
|
|
program depending on a library, or between an object file and some
|
|
extra source file.
|
|
|
|
When Configure processes the build.info files, it will take it as
|
|
truth without question, and will therefore perform very few checks.
|
|
If the build tree is separate from the source tree, it will assume
|
|
that all built files and up in the build directory and that all source
|
|
files are to be found in the source tree, if they can be found there.
|
|
Configure will assume that source files that can't be found in the
|
|
source tree (such as 'crypto/bildinf.h' in the example above) are
|
|
generated and will be found in the build tree.
|
|
|
|
|
|
The %unified_info database
|
|
--------------------------
|
|
|
|
The information in all the build.info get digested by Configure and
|
|
collected into the %unified_info database, divided into the following
|
|
indexes:
|
|
|
|
depends => a hash table containing 'file' => [ 'dependency' ... ]
|
|
pairs. These are directly inferred from the DEPEND
|
|
variables in build.info files.
|
|
|
|
engines => a list of engines. These are directly inferred from
|
|
the ENGINES variable in build.info files.
|
|
|
|
generate => a hash table containing 'file' => [ 'generator' ... ]
|
|
pairs. These are directly inferred from the GENERATE
|
|
variables in build.info files.
|
|
|
|
includes => a hash table containing 'file' => [ 'include' ... ]
|
|
pairs. These are directly inferred from the INCLUDE
|
|
variables in build.info files.
|
|
|
|
install => a hash table containing 'type' => [ 'file' ... ] pairs.
|
|
The types are 'programs', 'libraries', 'engines' and
|
|
'scripts', and the array of files list the files of
|
|
that type that should be installed.
|
|
|
|
libraries => a list of libraries. These are directly inferred from
|
|
the LIBS variable in build.info files.
|
|
|
|
ordinals => a hash table containing 'file' => [ 'word', 'ordfile' ]
|
|
pairs. 'file' and 'word' are directly inferred from
|
|
the ORDINALS variables in build.info files, while the
|
|
file 'ofile' comes from internal knowledge in
|
|
Configure.
|
|
|
|
programs => a list of programs. These are directly inferred from
|
|
the PROGRAMS variable in build.info files.
|
|
|
|
rawlines => a list of build-file lines. These are a direct copy of
|
|
the BEGINRAW..ENDRAW lines in build.info files. Note:
|
|
only the BEGINRAW..ENDRAW section for the current
|
|
platform are copied, the rest are ignored.
|
|
|
|
scripts => a list of scripts. There are directly inferred from
|
|
the SCRIPTS variable in build.info files.
|
|
|
|
sources => a hash table containing 'file' => [ 'sourcefile' ... ]
|
|
pairs. These are indirectly inferred from the SOURCE
|
|
variables in build.info files. Object files are
|
|
mentioned in this hash table, with source files from
|
|
SOURCE variables, and AS source files for programs and
|
|
libraries.
|
|
|
|
shared_sources =>
|
|
a hash table just like 'sources', but only as source
|
|
files (object files) for building shared libraries.
|
|
|
|
As an example, here is how the build.info files example from the
|
|
section above would be digested into a %unified_info table:
|
|
|
|
our %unified_info = (
|
|
"depends" =>
|
|
{
|
|
"apps/openssl" =>
|
|
[
|
|
"libssl",
|
|
],
|
|
"crypto/buildinf.h" =>
|
|
[
|
|
"Makefile",
|
|
],
|
|
"crypto/cversion.o" =>
|
|
[
|
|
"crypto/buildinf.h",
|
|
],
|
|
"engines/dasync" =>
|
|
[
|
|
"libcrypto",
|
|
],
|
|
"engines/ossltest" =>
|
|
[
|
|
"libcrypto.a",
|
|
],
|
|
"libssl" =>
|
|
[
|
|
"libcrypto",
|
|
],
|
|
"util/mkbuildinf.pl" =>
|
|
[
|
|
"util/Foo.pm",
|
|
],
|
|
},
|
|
"engines" =>
|
|
[
|
|
"engines/dasync",
|
|
"engines/ossltest",
|
|
],
|
|
"generate" =>
|
|
{
|
|
"crypto/buildinf.h" =>
|
|
[
|
|
"util/mkbuildinf.pl",
|
|
"\"\$(CC)",
|
|
"\$(CFLAGS)\"",
|
|
"\"$(PLATFORM)\"",
|
|
],
|
|
},
|
|
"includes" =>
|
|
{
|
|
"apps/openssl" =>
|
|
[
|
|
".",
|
|
"include",
|
|
],
|
|
"engines/ossltest" =>
|
|
[
|
|
"include"
|
|
],
|
|
"libcrypto" =>
|
|
[
|
|
"include",
|
|
],
|
|
"libssl" =>
|
|
[
|
|
"include",
|
|
],
|
|
"util/mkbuildinf.pl" =>
|
|
[
|
|
"util",
|
|
],
|
|
}
|
|
"install" =>
|
|
{
|
|
"engines" =>
|
|
[
|
|
"engines/dasync",
|
|
],
|
|
"libraries" =>
|
|
[
|
|
"libcrypto",
|
|
"libssl",
|
|
],
|
|
"programs" =>
|
|
[
|
|
"apps/openssl",
|
|
],
|
|
},
|
|
"libraries" =>
|
|
[
|
|
"libcrypto",
|
|
"libssl",
|
|
],
|
|
"ordinals" =>
|
|
{
|
|
"libcrypto" =>
|
|
[
|
|
"crypto",
|
|
"util/libcrypto.num",
|
|
],
|
|
"libssl" =>
|
|
[
|
|
"ssl",
|
|
"util/libssl.num",
|
|
],
|
|
},
|
|
"programs" =>
|
|
[
|
|
"apps/openssl",
|
|
],
|
|
"rawlines" =>
|
|
[
|
|
],
|
|
"sources" =>
|
|
{
|
|
"apps/openssl" =>
|
|
[
|
|
"apps/openssl.o",
|
|
],
|
|
"apps/openssl.o" =>
|
|
[
|
|
"apps/openssl.c",
|
|
],
|
|
"crypto/aes.o" =>
|
|
[
|
|
"crypto/aes.c",
|
|
],
|
|
"crypto/cversion.o" =>
|
|
[
|
|
"crypto/cversion.c",
|
|
],
|
|
"crypto/evp.o" =>
|
|
[
|
|
"crypto/evp.c",
|
|
],
|
|
"engines/e_dasync.o" =>
|
|
[
|
|
"engines/e_dasync.c",
|
|
],
|
|
"engines/dasync" =>
|
|
[
|
|
"engines/e_dasync.o",
|
|
],
|
|
"engines/e_ossltest.o" =>
|
|
[
|
|
"engines/e_ossltest.c",
|
|
],
|
|
"engines/ossltest" =>
|
|
[
|
|
"engines/e_ossltest.o",
|
|
],
|
|
"libcrypto" =>
|
|
[
|
|
"crypto/aes.c",
|
|
"crypto/cversion.c",
|
|
"crypto/evp.c",
|
|
],
|
|
"libssl" =>
|
|
[
|
|
"ssl/tls.c",
|
|
],
|
|
"ssl/tls.o" =>
|
|
[
|
|
"ssl/tls.c",
|
|
],
|
|
},
|
|
);
|
|
|
|
As can be seen, everything in %unified_info is fairly simple suggest
|
|
of information. Still, it tells us that to build all programs, we
|
|
must build 'apps/openssl', and to build the latter, we will need to
|
|
build all its sources ('apps/openssl.o' in this case) and all the
|
|
other things it depends on (such as 'libssl'). All those dependencies
|
|
need to be built as well, using the same logic, so to build 'libssl',
|
|
we need to build 'ssl/tls.o' as well as 'libcrypto', and to build the
|
|
latter...
|
|
|
|
|
|
Build-file templates
|
|
--------------------
|
|
|
|
Build-file templates are essentially build-files (such as Makefile on
|
|
Unix) with perl code fragments mixed in. Those perl code fragment
|
|
will generate all the configuration dependent data, including all the
|
|
rules needed to build end product files and intermediary files alike.
|
|
At a minimum, there must be a perl code fragment that defines a set of
|
|
functions that are used to generates specific build-file rules, to
|
|
build static libraries from object files, to build shared libraries
|
|
from static libraries, to programs from object files and libraries,
|
|
etc.
|
|
|
|
generatesrc - function that produces build file lines to generate
|
|
a source file from some input.
|
|
|
|
It's called like this:
|
|
|
|
generatesrc(src => "PATH/TO/tobegenerated",
|
|
generator => [ "generatingfile", ... ]
|
|
generator_incs => [ "INCL/PATH", ... ]
|
|
generator_deps => [ "dep1", ... ]
|
|
incs => [ "INCL/PATH", ... ],
|
|
deps => [ "dep1", ... ],
|
|
intent => one of "libs", "dso", "bin" );
|
|
|
|
'src' has the name of the file to be generated.
|
|
'generator' is the command or part of command to
|
|
generate the file, of which the first item is
|
|
expected to be the file to generate from.
|
|
generatesrc() is expected to analyse and figure out
|
|
exactly how to apply that file and how to capture
|
|
the result. 'generator_incs' and 'generator_deps'
|
|
are include directories and files that the generator
|
|
file itself depends on. 'incs' and 'deps' are
|
|
include directories and files that are used if $(CC)
|
|
is used as an intermediary step when generating the
|
|
end product (the file indicated by 'src'). 'intent'
|
|
indicates what the generated file is going to be
|
|
used for.
|
|
|
|
src2obj - function that produces build file lines to build an
|
|
object file from source files and associated data.
|
|
|
|
It's called like this:
|
|
|
|
src2obj(obj => "PATH/TO/objectfile",
|
|
srcs => [ "PATH/TO/sourcefile", ... ],
|
|
deps => [ "dep1", ... ],
|
|
incs => [ "INCL/PATH", ... ]
|
|
intent => one of "lib", "dso", "bin" );
|
|
|
|
'obj' has the intended object file *without*
|
|
extension, src2obj() is expected to add that.
|
|
'srcs' has the list of source files to build the
|
|
object file, with the first item being the source
|
|
file that directly corresponds to the object file.
|
|
'deps' is a list of explicit dependencies. 'incs'
|
|
is a list of include file directories. Finally,
|
|
'intent' indicates what this object file is going
|
|
to be used for.
|
|
|
|
obj2lib - function that produces build file lines to build a
|
|
static library file ("libfoo.a" in Unix terms) from
|
|
object files.
|
|
|
|
called like this:
|
|
|
|
obj2lib(lib => "PATH/TO/libfile",
|
|
objs => [ "PATH/TO/objectfile", ... ]);
|
|
|
|
'lib' has the intended library file name *without*
|
|
extension, obj2lib is expected to add that. 'objs'
|
|
has the list of object files (also *without*
|
|
extension) to build this library.
|
|
|
|
libobj2shlib - function that produces build file lines to build a
|
|
shareable object library file ("libfoo.so" in Unix
|
|
terms) from the corresponding static library file
|
|
or object files.
|
|
|
|
called like this:
|
|
|
|
libobj2shlib(shlib => "PATH/TO/shlibfile",
|
|
lib => "PATH/TO/libfile",
|
|
objs => [ "PATH/TO/objectfile", ... ],
|
|
deps => [ "PATH/TO/otherlibfile", ... ],
|
|
ordinals => [ "word", "/PATH/TO/ordfile" ]);
|
|
|
|
'lib' has the intended library file name *without*
|
|
extension, libobj2shlib is expected to add that.
|
|
'shlib' has the corresponding shared library name
|
|
*without* extension. 'deps' has the list of other
|
|
libraries (also *without* extension) this library
|
|
needs to be linked with. 'objs' has the list of
|
|
object files (also *without* extension) to build
|
|
this library. 'ordinals' MAY be present, and when
|
|
it is, its value is an array where the word is
|
|
"crypto" or "ssl" and the file is one of the ordinal
|
|
files util/libcrypto.num or util/libssl.num in the
|
|
source directory.
|
|
|
|
This function has a choice; it can use the
|
|
corresponding static library as input to make the
|
|
shared library, or the list of object files.
|
|
|
|
obj2dynlib - function that produces build file lines to build a
|
|
dynamically loadable library file ("libfoo.so" on
|
|
Unix) from object files.
|
|
|
|
called like this:
|
|
|
|
obj2dynlib(lib => "PATH/TO/libfile",
|
|
objs => [ "PATH/TO/objectfile", ... ],
|
|
deps => [ "PATH/TO/otherlibfile",
|
|
... ]);
|
|
|
|
This is almost the same as libobj2shlib, but the
|
|
intent is to build a shareable library that can be
|
|
loaded in runtime (a "plugin"...). The differences
|
|
are subtle, one of the most visible ones is that the
|
|
resulting shareable library is produced from object
|
|
files only.
|
|
|
|
obj2bin - function that produces build file lines to build an
|
|
executable file from object files.
|
|
|
|
called like this:
|
|
|
|
obj2bin(bin => "PATH/TO/binfile",
|
|
objs => [ "PATH/TO/objectfile", ... ],
|
|
deps => [ "PATH/TO/libfile", ... ]);
|
|
|
|
'bin' has the intended executable file name
|
|
*without* extension, obj2bin is expected to add
|
|
that. 'objs' has the list of object files (also
|
|
*without* extension) to build this library. 'deps'
|
|
has the list of library files (also *without*
|
|
extension) that the programs needs to be linked
|
|
with.
|
|
|
|
in2script - function that produces build file lines to build a
|
|
script file from some input.
|
|
|
|
called like this:
|
|
|
|
in2script(script => "PATH/TO/scriptfile",
|
|
sources => [ "PATH/TO/infile", ... ]);
|
|
|
|
'script' has the intended script file name.
|
|
'sources' has the list of source files to build the
|
|
resulting script from.
|
|
|
|
Along with the build-file templates is the driving engine
|
|
Configurations/common.tmpl, which looks through all the information in
|
|
%unified_info and generates all the rulesets to build libraries,
|
|
programs and all intermediate files, using the rule generating
|
|
functions defined in the build-file template.
|
|
|
|
As an example with the smaller build.info set we've seen as an
|
|
example, producing the rules to build 'libcrypto' would result in the
|
|
following calls:
|
|
|
|
# Note: libobj2shlib will only be called if shared libraries are
|
|
# to be produced.
|
|
# Note 2: libobj2shlib gets both the name of the static library
|
|
# and the names of all the object files that go into it. It's up
|
|
# to the implementation to decide which to use as input.
|
|
# Note 3: common.tmpl peals off the ".o" extension from all object
|
|
# files, as the platform at hand may have a different one.
|
|
libobj2shlib(shlib => "libcrypto",
|
|
lib => "libcrypto",
|
|
objs => [ "crypto/aes", "crypto/evp", "crypto/cversion" ],
|
|
deps => [ ]
|
|
ordinals => [ "crypto", "util/libcrypto.num" ]);
|
|
|
|
obj2lib(lib => "libcrypto"
|
|
objs => [ "crypto/aes", "crypto/evp", "crypto/cversion" ]);
|
|
|
|
src2obj(obj => "crypto/aes"
|
|
srcs => [ "crypto/aes.c" ],
|
|
deps => [ ],
|
|
incs => [ "include" ],
|
|
intent => "lib");
|
|
|
|
src2obj(obj => "crypto/evp"
|
|
srcs => [ "crypto/evp.c" ],
|
|
deps => [ ],
|
|
incs => [ "include" ],
|
|
intent => "lib");
|
|
|
|
src2obj(obj => "crypto/cversion"
|
|
srcs => [ "crypto/cversion.c" ],
|
|
deps => [ "crypto/buildinf.h" ],
|
|
incs => [ "include" ],
|
|
intent => "lib");
|
|
|
|
generatesrc(src => "crypto/buildinf.h",
|
|
generator => [ "util/mkbuildinf.pl", "\"$(CC)",
|
|
"$(CFLAGS)\"", "\"$(PLATFORM)\"" ],
|
|
generator_incs => [ "util" ],
|
|
generator_deps => [ "util/Foo.pm" ],
|
|
incs => [ ],
|
|
deps => [ ],
|
|
intent => "lib");
|
|
|
|
The returned strings from all those calls are then concatenated
|
|
together and written to the resulting build-file.
|