openpkg/rpm-config.pod@4a34d7a82eab (annotated)
openpkg/rpm-config.pod
Tue, 29 Mar 2011 20:04:34 +0200
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 29 Mar 2011 20:04:34 +0200
- changeset 334
- 4a34d7a82eab
- child 428
- f880f219c566
- permissions
- -rw-r--r--
Rework package yet again, correcting and introducing new buildconf logic:
Conditionally disable bootstrap stage comparison correctly, correct
english grammar, better find system as(1) and ld(1), indotruce detailed
optimization option messages, more completely guess cpu types, allow
profiled bootstrapping without a preinstalled GCC because many other
compilers have long since implemented 64-bit arithmetic, instruct make
to build sequentially (not in sparallel) when building a profiled
bootstrap as GCC online documents recommend, and generally improve
comment blocks.
The single most important correction in this changeset relates to the
GCC changed optimization policy since at least GCC 4.5, in which -march
is always passed and not always correctly guessed. In the case of this
package, allowing GCC to guess the architecture leads to wild build
errors at various subcomponents (zlib, libgcc, libiberty...) and
bootstrap stages. It seems quite platform specific, and the safest
approach to correcting this seems to be explicitly always specifying the
-march argument when bootstrapping GCC. Because the best choice 'native'
is not available when bootstrapping using a foreign (non GCC) compiler,
a guess is made according to rpmmacros l_platform in that case.
It is questionable as to whether these recent optimization changes
on the part of GCC or this package are compatible with each other,
or if either are complete or correct at all. At least applying these
corrections allows this package to build again in most cases test.
| michael@13 | 1 | ## |
| michael@13 | 2 | ## rpm-config -- OpenPKG RPM Library Build Utility |
| michael@13 | 3 | ## Copyright (c) 2000-2007 OpenPKG Foundation e.V. <http://openpkg.net/> |
| michael@13 | 4 | ## Copyright (c) 2000-2007 Ralf S. Engelschall <http://engelschall.com/> |
| michael@13 | 5 | ## |
| michael@13 | 6 | ## Permission to use, copy, modify, and distribute this software for |
| michael@13 | 7 | ## any purpose with or without fee is hereby granted, provided that |
| michael@13 | 8 | ## the above copyright notice and this permission notice appear in all |
| michael@13 | 9 | ## copies. |
| michael@13 | 10 | ## |
| michael@13 | 11 | ## THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| michael@13 | 12 | ## WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| michael@13 | 13 | ## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| michael@13 | 14 | ## IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR |
| michael@13 | 15 | ## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| michael@13 | 16 | ## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| michael@13 | 17 | ## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| michael@13 | 18 | ## USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| michael@13 | 19 | ## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| michael@13 | 20 | ## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| michael@13 | 21 | ## OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| michael@13 | 22 | ## SUCH DAMAGE. |
| michael@13 | 23 | ## |
| michael@13 | 24 | ## rpm-config.pod: manual page |
| michael@13 | 25 | ## |
| michael@13 | 26 | |
| michael@13 | 27 | =pod |
| michael@13 | 28 | |
| michael@13 | 29 | =head1 NAME |
| michael@13 | 30 | |
| michael@13 | 31 | B<rpm-config> - OpenPKG RPM library build utility |
| michael@13 | 32 | |
| michael@13 | 33 | =head1 VERSION |
| michael@13 | 34 | |
| michael@13 | 35 | OpenPKG RPM RPM_VERSION |
| michael@13 | 36 | |
| michael@13 | 37 | =head1 SYNOPSIS |
| michael@13 | 38 | |
| michael@13 | 39 | B<rpm-config> |
| michael@13 | 40 | [B<--help>] |
| michael@13 | 41 | [B<--version>] |
| michael@13 | 42 | [B<--cc>] |
| michael@13 | 43 | [B<--cppflags>] |
| michael@13 | 44 | [B<--cflags>] |
| michael@13 | 45 | [B<--ldflags>] |
| michael@13 | 46 | [B<--libs>] |
| michael@13 | 47 | |
| michael@13 | 48 | =head1 DESCRIPTION |
| michael@13 | 49 | |
| michael@13 | 50 | The B<rpm-config> program is a little helper utility for easy |
| michael@13 | 51 | configuring and building applications based on the OpenPKG RPM library. |
| michael@13 | 52 | It can be used to query the C compiler and linker flags which are |
| michael@13 | 53 | required to correctly compile and link the application against the |
| michael@13 | 54 | RPM library. |
| michael@13 | 55 | |
| michael@13 | 56 | =head1 OPTIONS |
| michael@13 | 57 | |
| michael@13 | 58 | B<rpm-config> accepts the following options: |
| michael@13 | 59 | |
| michael@13 | 60 | =over 4 |
| michael@13 | 61 | |
| michael@13 | 62 | =item B<--help> |
| michael@13 | 63 | |
| michael@13 | 64 | Prints the short usage information. |
| michael@13 | 65 | |
| michael@13 | 66 | =item B<--version> |
| michael@13 | 67 | |
| michael@13 | 68 | Prints the version number and date of the installed RPM library. |
| michael@13 | 69 | |
| michael@13 | 70 | =item B<--cc> |
| michael@13 | 71 | |
| michael@13 | 72 | =item B<--cppflags> |
| michael@13 | 73 | |
| michael@13 | 74 | Prints the C pre-processor flags (C<-I>) which are needed to compile the |
| michael@13 | 75 | RPM-based application. The output is usually added to the C<CPPFLAGS> |
| michael@13 | 76 | variable of the applications C<Makefile>. |
| michael@13 | 77 | |
| michael@13 | 78 | =item B<--cflags> |
| michael@13 | 79 | |
| michael@13 | 80 | Prints the C compiler flags which are needed to compile the RPM-based |
| michael@13 | 81 | application. The output is usually added to the C<CFLAGS> variable of the |
| michael@13 | 82 | applications C<Makefile>. |
| michael@13 | 83 | |
| michael@13 | 84 | =item B<--ldflags> |
| michael@13 | 85 | |
| michael@13 | 86 | Prints the linker flags (C<-L>) which are needed to link the application with |
| michael@13 | 87 | the RPM library. The output is usually added to the C<LDFLAGS> variable of |
| michael@13 | 88 | the applications C<Makefile>. |
| michael@13 | 89 | |
| michael@13 | 90 | =item B<--libs> |
| michael@13 | 91 | |
| michael@13 | 92 | Prints the library flags (C<-l>) which are needed to link the application with |
| michael@13 | 93 | the RPM library. The output is usually added to the C<LIBS> variable of the |
| michael@13 | 94 | applications C<Makefile>. |
| michael@13 | 95 | |
| michael@13 | 96 | =back |
| michael@13 | 97 | |
| michael@13 | 98 | =head1 EXAMPLE |
| michael@13 | 99 | |
| michael@13 | 100 | CC = `rpm-config --cc` |
| michael@13 | 101 | CPPFLAGS = `rpm-config --cppflags` |
| michael@13 | 102 | CFLAGS = `rpm-config --cflags` |
| michael@13 | 103 | LDFLAGS = `rpm-config --ldflags` |
| michael@13 | 104 | LIBS = `rpm-config --libs` |
| michael@13 | 105 | |
| michael@13 | 106 | all: foo |
| michael@13 | 107 | |
| michael@13 | 108 | foo: foo.o |
| michael@13 | 109 | $(CC) $(LDFLAGS) -o foo foo.o $(LIBS) |
| michael@13 | 110 | |
| michael@13 | 111 | foo.o: foo.c |
| michael@13 | 112 | $(CC) $(CPPFLAGS) $(CFLAGS) -o foo.o -c foo.c |
| michael@13 | 113 | |
| michael@13 | 114 | =head1 SEE ALSO |
| michael@13 | 115 | |
| michael@13 | 116 | rpm(1), cc(1). |
| michael@13 | 117 | |
| michael@13 | 118 | =head1 AUTHOR |
| michael@13 | 119 | |
| michael@13 | 120 | Ralf S. Engelschall |
| michael@13 | 121 | rse@engelschall.com |
| michael@13 | 122 | www.engelschall.com |
| michael@13 | 123 | |
| michael@13 | 124 | =cut |
| michael@13 | 125 |
