openpkg/rpm-config.8@4a34d7a82eab
openpkg/rpm-config.8
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.
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131 .IX Title "RPM-CONFIG 8"
132 .TH RPM-CONFIG 8 "OpenPKG" "RPM-CONFIG(8)" "OpenPKG"
133 .SH "NAME"
134 \&\fBrpm\-config\fR \- OpenPKG RPM library build utility
135 .SH "VERSION"
136 .IX Header "VERSION"
137 OpenPKG \s-1RPM\s0 \s-1RPM_VERSION\s0
138 .SH "SYNOPSIS"
139 .IX Header "SYNOPSIS"
140 \&\fBrpm-config\fR
141 [\fB\-\-help\fR]
142 [\fB\-\-version\fR]
143 [\fB\-\-cc\fR]
144 [\fB\-\-cppflags\fR]
145 [\fB\-\-cflags\fR]
146 [\fB\-\-ldflags\fR]
147 [\fB\-\-libs\fR]
148 .SH "DESCRIPTION"
149 .IX Header "DESCRIPTION"
150 The \fBrpm-config\fR program is a little helper utility for easy
151 configuring and building applications based on the OpenPKG \s-1RPM\s0 library.
152 It can be used to query the C compiler and linker flags which are
153 required to correctly compile and link the application against the
154 \&\s-1RPM\s0 library.
155 .SH "OPTIONS"
156 .IX Header "OPTIONS"
157 \&\fBrpm-config\fR accepts the following options:
158 .IP "\fB\-\-help\fR" 4
159 .IX Item "--help"
160 Prints the short usage information.
161 .IP "\fB\-\-version\fR" 4
162 .IX Item "--version"
163 Prints the version number and date of the installed \s-1RPM\s0 library.
164 .IP "\fB\-\-cc\fR" 4
165 .IX Item "--cc"
166 .PD 0
167 .IP "\fB\-\-cppflags\fR" 4
168 .IX Item "--cppflags"
169 .PD
170 Prints the C pre-processor flags (\f(CW\*(C`\-I\*(C'\fR) which are needed to compile the
171 RPM-based application. The output is usually added to the \f(CW\*(C`CPPFLAGS\*(C'\fR
172 variable of the applications \f(CW\*(C`Makefile\*(C'\fR.
173 .IP "\fB\-\-cflags\fR" 4
174 .IX Item "--cflags"
175 Prints the C compiler flags which are needed to compile the RPM-based
176 application. The output is usually added to the \f(CW\*(C`CFLAGS\*(C'\fR variable of the
177 applications \f(CW\*(C`Makefile\*(C'\fR.
178 .IP "\fB\-\-ldflags\fR" 4
179 .IX Item "--ldflags"
180 Prints the linker flags (\f(CW\*(C`\-L\*(C'\fR) which are needed to link the application with
181 the \s-1RPM\s0 library. The output is usually added to the \f(CW\*(C`LDFLAGS\*(C'\fR variable of
182 the applications \f(CW\*(C`Makefile\*(C'\fR.
183 .IP "\fB\-\-libs\fR" 4
184 .IX Item "--libs"
185 Prints the library flags (\f(CW\*(C`\-l\*(C'\fR) which are needed to link the application with
186 the \s-1RPM\s0 library. The output is usually added to the \f(CW\*(C`LIBS\*(C'\fR variable of the
187 applications \f(CW\*(C`Makefile\*(C'\fR.
188 .SH "EXAMPLE"
189 .IX Header "EXAMPLE"
190 .Vb 5
191 \& CC = `rpm-config --cc`
192 \& CPPFLAGS = `rpm-config --cppflags`
193 \& CFLAGS = `rpm-config --cflags`
194 \& LDFLAGS = `rpm-config --ldflags`
195 \& LIBS = `rpm-config --libs`
196 .Ve
197 .PP
198 .Vb 1
199 \& all: foo
200 .Ve
201 .PP
202 .Vb 2
203 \& foo: foo.o
204 \& $(CC) $(LDFLAGS) -o foo foo.o $(LIBS)
205 .Ve
206 .PP
207 .Vb 2
208 \& foo.o: foo.c
209 \& $(CC) $(CPPFLAGS) $(CFLAGS) -o foo.o -c foo.c
210 .Ve
211 .SH "SEE ALSO"
212 .IX Header "SEE ALSO"
213 \&\fIrpm\fR\|(1), \fIcc\fR\|(1).
214 .SH "AUTHOR"
215 .IX Header "AUTHOR"
216 .Vb 3
217 \& Ralf S. Engelschall
218 \& rse@engelschall.com
219 \& www.engelschall.com
220 .Ve
