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// usage.cc
#include "main.ih"
namespace {
char const info1[] = R"_( [options] jobs [compiler]
Where:
[options] - optional arguments (short options between parentheses):
--help (-h) - provide this help
--nr (-n) - show the thread number compiling a source
file (not used when -qq is specified)
--quiet (-q) - only show the source filenames. Use twice to
suppress listing the sourcefiles.
--threads (-t) nThreads - number of compilation threads
(default )_";
char const info2[] = R"_( threads)
--version (-v) - show version information and terminate
jobs - the name of a file containing the specs of the files to
compile. Specs start with lines like ': support tmp/o 5' where
the 2nd element specifies the location of the source files; the
3rd element specifies the destination directory of the compiled
files; and the 4th element specifies the prefix to add in front
of the compiled object files. The names of the source files to
compile follow next. Non-existing destination directories are
created.
compiler - this argument is optional. By default the following
specification is used (all on one line)
g++ -c -o $2 ${ICMAKE_CPPSTD} --Wall -Werror $1
In this specification '$1' is replaced by the location of the
source file to compile and '$2' is replaced by the location of
the compiled object file. If the environment variable
'ICMAKE_CPPSTD' is defined (specifying the bf(C++) standard to
use, e.g., 'ICMAKE_CPPSTD=--std=c++26') then its value replaces
'${ICMAKE_CPPSTD}' in the specification.
Alternatively, the command compiling source files can be
provided as second command-line argument (in which case it
should be quoted), or the second command-line argument can be
'f:file', where 'file' is the name of a file whose first line
contains the specification of the command compiling source
files (which must specify '$1' and '$2' and optionally
'$ICMAKE_CPPSTD').
The 'PATH' environment variable is used to locate
the compiler; the compiler's absolute path can also be used.
)_";
}
void usage(std::string const &progname)
{
Tools::usageTop(progname) << info1 << thread::hardware_concurrency() <<
info2;
}
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