/[gentoo-x86]/eclass/haskell-cabal.eclass
Gentoo

Contents of /eclass/haskell-cabal.eclass

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1.30 - (hide annotations) (download)
Sat Apr 14 19:30:53 2012 UTC (2 years, 5 months ago) by slyfox
Branch: MAIN
Changes since 1.29: +7 -4 lines
fix -dynamic './setup configure' failures against newer libffi (bug #411789 by Leonid Podolny)

1 slyfox 1.26 # Copyright 1999-2012 Gentoo Foundation
2 kosmikus 1.1 # Distributed under the terms of the GNU General Public License v2
3 slyfox 1.30 # $Header: /var/cvsroot/gentoo-x86/eclass/haskell-cabal.eclass,v 1.29 2012/04/09 18:08:45 slyfox Exp $
4 vapier 1.25
5     # @ECLASS: haskell-cabal.eclass
6     # @MAINTAINER:
7     # Haskell herd <haskell@gentoo.org>
8     # @AUTHOR:
9     # Original author: Andres Loeh <kosmikus@gentoo.org>
10     # Original author: Duncan Coutts <dcoutts@gentoo.org>
11     # @BLURB: for packages that make use of the Haskell Common Architecture for Building Applications and Libraries (cabal)
12     # @DESCRIPTION:
13 kosmikus 1.1 # Basic instructions:
14     #
15     # Before inheriting the eclass, set CABAL_FEATURES to
16     # reflect the tools and features that the package makes
17     # use of.
18     #
19     # Currently supported features:
20     # haddock -- for documentation generation
21 kolmodin 1.21 # hscolour -- generation of colourised sources
22 kosmikus 1.1 # alex -- lexer/scanner generator
23     # happy -- parser generator
24     # c2hs -- C interface generator
25     # cpphs -- C preprocessor clone written in Haskell
26     # profile -- if package supports to build profiling-enabled libraries
27     # bootstrap -- only used for the cabal package itself
28 dcoutts 1.3 # bin -- the package installs binaries
29     # lib -- the package installs libraries
30 kolmodin 1.16 # nocabaldep -- don't add dependency on cabal.
31 slyfox 1.23 # only used for packages that _must_ not pull the dependency
32     # on cabal, but still use this eclass (e.g. haskell-updater).
33 kosmikus 1.1
34 dcoutts 1.11 inherit ghc-package multilib
35 kosmikus 1.1
36 slyfox 1.24 # @ECLASS-VARIABLE: CABAL_EXTRA_CONFIGURE_FLAGS
37     # @DESCRIPTION:
38     # User-specified additional parameters passed to 'setup configure'.
39     # example: /etc/make.conf: CABAL_EXTRA_CONFIGURE_FLAGS=--enable-shared
40     : ${CABAL_EXTRA_CONFIGURE_FLAGS:=}
41    
42 slyfox 1.27 # @ECLASS-VARIABLE: CABAL_EXTRA_BUILD_FLAGS
43     # @DESCRIPTION:
44     # User-specified additional parameters passed to 'setup build'.
45     # example: /etc/make.conf: CABAL_EXTRA_BUILD_FLAGS=-v
46     : ${CABAL_EXTRA_BUILD_FLAGS:=}
47    
48 slyfox 1.24 # @ECLASS-VARIABLE: GHC_BOOTSTRAP_FLAGS
49     # @DESCRIPTION:
50     # User-specified additional parameters for ghc when building
51     # _only_ 'setup' binary bootstrap.
52     # example: /etc/make.conf: GHC_BOOTSTRAP_FLAGS=-dynamic to make
53     # linking 'setup' faster.
54     : ${GHC_BOOTSTRAP_FLAGS:=}
55    
56 kolmodin 1.19 HASKELL_CABAL_EXPF="pkg_setup src_compile src_test src_install"
57    
58     case "${EAPI:-0}" in
59     2|3|4) HASKELL_CABAL_EXPF+=" src_configure" ;;
60     *) ;;
61     esac
62    
63     EXPORT_FUNCTIONS ${HASKELL_CABAL_EXPF}
64 kosmikus 1.1
65     for feature in ${CABAL_FEATURES}; do
66     case ${feature} in
67 kolmodin 1.16 haddock) CABAL_USE_HADDOCK=yes;;
68 kolmodin 1.21 hscolour) CABAL_USE_HSCOLOUR=yes;;
69 slyfox 1.26 hoogle) CABAL_USE_HOOGLE=yes;;
70 kolmodin 1.16 alex) CABAL_USE_ALEX=yes;;
71     happy) CABAL_USE_HAPPY=yes;;
72     c2hs) CABAL_USE_C2HS=yes;;
73     cpphs) CABAL_USE_CPPHS=yes;;
74     profile) CABAL_USE_PROFILE=yes;;
75     bootstrap) CABAL_BOOTSTRAP=yes;;
76     bin) CABAL_HAS_BINARIES=yes;;
77     lib) CABAL_HAS_LIBRARIES=yes;;
78     nocabaldep) CABAL_FROM_GHC=yes;;
79 dcoutts 1.3 *) CABAL_UNKNOWN="${CABAL_UNKNOWN} ${feature}";;
80 kosmikus 1.1 esac
81     done
82    
83     if [[ -n "${CABAL_USE_HADDOCK}" ]]; then
84     IUSE="${IUSE} doc"
85 slyfox 1.28 # don't require depend on itself to build docs.
86     # ebuild bootstraps docs from just built binary
87     [[ ${CATEGORY}/${PN} = "dev-haskell/haddock" ]] || DEPEND="${DEPEND} doc? ( dev-haskell/haddock )"
88 kosmikus 1.1 fi
89    
90 kolmodin 1.21 if [[ -n "${CABAL_USE_HSCOLOUR}" ]]; then
91     IUSE="${IUSE} hscolour"
92     DEPEND="${DEPEND} hscolour? ( dev-haskell/hscolour )"
93     fi
94    
95 kosmikus 1.1 if [[ -n "${CABAL_USE_ALEX}" ]]; then
96     DEPEND="${DEPEND} dev-haskell/alex"
97     fi
98    
99     if [[ -n "${CABAL_USE_HAPPY}" ]]; then
100     DEPEND="${DEPEND} dev-haskell/happy"
101     fi
102    
103     if [[ -n "${CABAL_USE_C2HS}" ]]; then
104     DEPEND="${DEPEND} dev-haskell/c2hs"
105     fi
106    
107     if [[ -n "${CABAL_USE_CPPHS}" ]]; then
108     DEPEND="${DEPEND} dev-haskell/cpphs"
109     fi
110    
111     if [[ -n "${CABAL_USE_PROFILE}" ]]; then
112     IUSE="${IUSE} profile"
113     fi
114    
115     # We always use a standalone version of Cabal, rather than the one that comes
116     # with GHC. But of course we can't depend on cabal when building cabal itself.
117 dcoutts 1.14 if [[ -z ${CABAL_MIN_VERSION} ]]; then
118     CABAL_MIN_VERSION=1.1.4
119     fi
120 kolmodin 1.16 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]]; then
121 dcoutts 1.11 DEPEND="${DEPEND} >=dev-haskell/cabal-${CABAL_MIN_VERSION}"
122 kosmikus 1.1 fi
123    
124 dcoutts 1.3 # Libraries require GHC to be installed.
125     if [[ -n "${CABAL_HAS_LIBRARIES}" ]]; then
126 dcoutts 1.11 RDEPEND="${RDEPEND} dev-lang/ghc"
127 dcoutts 1.3 fi
128 kosmikus 1.1
129 dcoutts 1.14 # returns the version of cabal currently in use
130     _CABAL_VERSION_CACHE=""
131     cabal-version() {
132     if [[ -z "${_CABAL_VERSION_CACHE}" ]]; then
133     if [[ "${CABAL_BOOTSTRAP}" ]]; then
134     # We're bootstrapping cabal, so the cabal version is the version
135     # of this package itself.
136     _CABAL_VERSION_CACHE="${PV}"
137 kolmodin 1.17 elif [[ "${CABAL_FROM_GHC}" ]]; then
138 slyfox 1.24 local cabal_package=$(echo "$(ghc-libdir)"/Cabal-*)
139     # /path/to/ghc/Cabal-${VER} -> ${VER}
140     _CABAL_VERSION_CACHE="${cabal_package/*Cabal-/}"
141 dcoutts 1.14 else
142     # We ask portage, not ghc, so that we only pick up
143     # portage-installed cabal versions.
144     _CABAL_VERSION_CACHE="$(ghc-extractportageversion dev-haskell/cabal)"
145     fi
146     fi
147     echo "${_CABAL_VERSION_CACHE}"
148     }
149    
150 kosmikus 1.1 cabal-bootstrap() {
151     local setupmodule
152 dcoutts 1.14 local cabalpackage
153 kosmikus 1.1 if [[ -f "${S}/Setup.lhs" ]]; then
154     setupmodule="${S}/Setup.lhs"
155 slyfox 1.29 elif [[ -f "${S}/Setup.hs" ]]; then
156     setupmodule="${S}/Setup.hs"
157 kosmikus 1.1 else
158 slyfox 1.29 die "No Setup.lhs or Setup.hs found"
159 kosmikus 1.1 fi
160    
161     # We build the setup program using the latest version of
162     # cabal that we have installed
163 slyfox 1.29 cabalpackage=Cabal-$(cabal-version)
164 dcoutts 1.14 einfo "Using cabal-$(cabal-version)."
165 slyfox 1.24
166     make_setup() {
167 slyfox 1.26 set -- -package "${cabalpackage}" --make "${setupmodule}" \
168 slyfox 1.24 ${GHC_BOOTSTRAP_FLAGS} \
169     "$@" \
170     -o setup
171 slyfox 1.27 echo $(ghc-getghc) ${HCFLAGS} "$@"
172 slyfox 1.26 $(ghc-getghc) "$@"
173 slyfox 1.24 }
174     if $(ghc-supports-shared-libraries); then
175 slyfox 1.30 # # some custom build systems might use external libraries,
176     # # for which we don't have shared libs, so keep static fallback
177     # Disabled '-dynamic' as ghc does not embed RPATH to used extra-libraries:
178     # bug #411789, http://hackage.haskell.org/trac/ghc/ticket/5743#comment:3
179     # make_setup -dynamic "$@" ||
180     make_setup "$@" || die "compiling ${setupmodule} failed"
181 slyfox 1.24 else
182     make_setup "$@" || die "compiling ${setupmodule} failed"
183     fi
184 kosmikus 1.1 }
185    
186 dcoutts 1.14 cabal-mksetup() {
187     local setupdir
188    
189     if [[ -n $1 ]]; then
190     setupdir=$1
191     else
192     setupdir=${S}
193     fi
194    
195     rm -f "${setupdir}"/Setup.{lhs,hs}
196    
197     echo 'import Distribution.Simple; main = defaultMainWithHooks defaultUserHooks' \
198 slyfox 1.29 > $setupdir/Setup.hs || die "failed to create default Setup.hs"
199 dcoutts 1.14 }
200    
201 kolmodin 1.21 cabal-hscolour() {
202 slyfox 1.26 set -- hscolour "$@"
203     echo ./setup "$@"
204     ./setup "$@" || die "setup hscolour failed"
205 kolmodin 1.21 }
206    
207 kosmikus 1.1 cabal-haddock() {
208 slyfox 1.26 set -- haddock "$@"
209     echo ./setup "$@"
210     ./setup "$@" || die "setup haddock failed"
211 kosmikus 1.1 }
212    
213 kolmodin 1.21 cabal-hscolour-haddock() {
214     # --hyperlink-source implies calling 'setup hscolour'
215 slyfox 1.26 set -- haddock --hyperlink-source
216     echo ./setup "$@"
217     ./setup "$@" --hyperlink-source || die "setup haddock --hyperlink-source failed"
218 kolmodin 1.21 }
219    
220 kosmikus 1.1 cabal-configure() {
221 slyfox 1.23 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
222    
223 dcoutts 1.14 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
224 slyfox 1.23 cabalconf="${cabalconf} --with-haddock=${EPREFIX}/usr/bin/haddock"
225 dcoutts 1.14 fi
226 kosmikus 1.1 if [[ -n "${CABAL_USE_PROFILE}" ]] && use profile; then
227 dcoutts 1.2 cabalconf="${cabalconf} --enable-library-profiling"
228 kosmikus 1.1 fi
229 slyfox 1.23 if [[ -n "${CABAL_USE_ALEX}" ]]; then
230     cabalconf="${cabalconf} --with-alex=${EPREFIX}/usr/bin/alex"
231     fi
232    
233     if [[ -n "${CABAL_USE_HAPPY}" ]]; then
234     cabalconf="${cabalconf} --with-happy=${EPREFIX}/usr/bin/happy"
235     fi
236    
237     if [[ -n "${CABAL_USE_C2HS}" ]]; then
238     cabalconf="${cabalconf} --with-c2hs=${EPREFIX}/usr/bin/c2hs"
239     fi
240     if [[ -n "${CABAL_USE_CPPHS}" ]]; then
241     cabalconf="${cabalconf} --with-cpphs=${EPREFIX}/usr/bin/cpphs"
242     fi
243    
244 slyfox 1.27 local option
245     for option in ${HCFLAGS}
246     do
247     cabalconf+=" --ghc-option=$option"
248     done
249    
250 dcoutts 1.6 # Building GHCi libs on ppc64 causes "TOC overflow".
251     if use ppc64; then
252 dcoutts 1.5 cabalconf="${cabalconf} --disable-library-for-ghci"
253     fi
254 kosmikus 1.1
255 slyfox 1.24 # currently cabal does not respect CFLAGS and LDFLAGS on it's own (bug #333217)
256     # so translate LDFLAGS to ghc parameters (without filtering)
257     local flag
258     for flag in $LDFLAGS; do cabalconf="${cabalconf} --ghc-option=-optl$flag"; done
259    
260 slyfox 1.29 # disable executable stripping for the executables, as portage will
261     # strip by itself, and pre-stripping gives a QA warning.
262     # cabal versions previous to 1.4 does not strip executables, and does
263     # not accept the flag.
264     # this fixes numerous bugs, amongst them;
265     # bug #251881, bug #251882, bug #251884, bug #251886, bug #299494
266     cabalconf="${cabalconf} --disable-executable-stripping"
267    
268     cabalconf="${cabalconf} --docdir=${EPREFIX}/usr/share/doc/${PF}"
269     # As of Cabal 1.2, configure is quite quiet. For diagnostic purposes
270     # it's better if the configure chatter is in the build logs:
271     cabalconf="${cabalconf} --verbose"
272 dcoutts 1.11
273 slyfox 1.24 # We build shared version of our Cabal where ghc ships it's shared
274     # version of it. We will link ./setup as dynamic binary againt Cabal later.
275     [[ ${CATEGORY}/${PN} == "dev-haskell/cabal" ]] && \
276     $(ghc-supports-shared-libraries) && \
277     cabalconf="${cabalconf} --enable-shared"
278    
279 slyfox 1.26 set -- configure \
280 slyfox 1.23 --ghc --prefix="${EPREFIX}"/usr \
281 kosmikus 1.1 --with-compiler="$(ghc-getghc)" \
282     --with-hc-pkg="$(ghc-getghcpkg)" \
283 slyfox 1.23 --prefix="${EPREFIX}"/usr \
284     --libdir="${EPREFIX}"/usr/$(get_libdir) \
285 dcoutts 1.11 --libsubdir=${P}/ghc-$(ghc-version) \
286 slyfox 1.23 --datadir="${EPREFIX}"/usr/share/ \
287 dcoutts 1.11 --datasubdir=${P}/ghc-$(ghc-version) \
288 kosmikus 1.1 ${cabalconf} \
289 kosmikus 1.8 ${CABAL_CONFIGURE_FLAGS} \
290 slyfox 1.24 ${CABAL_EXTRA_CONFIGURE_FLAGS} \
291 slyfox 1.26 "$@"
292     echo ./setup "$@"
293     ./setup "$@" || die "setup configure failed"
294 kosmikus 1.1 }
295    
296     cabal-build() {
297 dcoutts 1.14 unset LANG LC_ALL LC_MESSAGES
298 slyfox 1.27 set -- build ${CABAL_EXTRA_BUILD_FLAGS} "$@"
299 slyfox 1.26 echo ./setup "$@"
300     ./setup "$@" \
301 kosmikus 1.1 || die "setup build failed"
302     }
303    
304     cabal-copy() {
305 slyfox 1.23 has "${EAPI:-0}" 0 1 2 && ! use prefix && ED=${D}
306    
307 slyfox 1.26 set -- copy --destdir="${D}" "$@"
308     echo ./setup "$@"
309     ./setup "$@" || die "setup copy failed"
310 kosmikus 1.1
311     # cabal is a bit eager about creating dirs,
312     # so remove them if they are empty
313 slyfox 1.23 rmdir "${ED}/usr/bin" 2> /dev/null
314 kosmikus 1.1 }
315    
316     cabal-pkg() {
317 kosmikus 1.9 # This does not actually register since we're using true instead
318 slyfox 1.29 # of ghc-pkg. So it just leaves the .conf file and we can
319 kosmikus 1.1 # register that ourselves (if it exists).
320 dcoutts 1.2
321 dcoutts 1.4 if [[ -n ${CABAL_HAS_LIBRARIES} ]]; then
322 slyfox 1.29 # Newer cabal can generate a package conf for us:
323     ./setup register --gen-pkg-config="${T}/${P}.conf"
324     ghc-setup-pkg "${T}/${P}.conf"
325     ghc-install-pkg
326 kosmikus 1.1 fi
327     }
328    
329 kolmodin 1.13 # Some cabal libs are bundled along with some versions of ghc
330     # eg filepath-1.0 comes with ghc-6.6.1
331     # by putting CABAL_CORE_LIB_GHC_PV="6.6.1" in an ebuild we are declaring that
332     # when building with this version of ghc, the ebuild is a dummy that is it will
333     # install no files since the package is already included with ghc.
334     # However portage still records the dependency and we can upgrade the package
335     # to a later one that's not included with ghc.
336     # You can also put a space separated list, eg CABAL_CORE_LIB_GHC_PV="6.6 6.6.1".
337     cabal-is-dummy-lib() {
338     for version in ${CABAL_CORE_LIB_GHC_PV[*]}; do
339     [[ "$(ghc-version)" == "$version" ]] && return 0
340     done
341     return 1
342     }
343    
344 kosmikus 1.1 # exported function: check if cabal is correctly installed for
345     # the currently active ghc (we cannot guarantee this with portage)
346     haskell-cabal_pkg_setup() {
347 kolmodin 1.16 if [[ -z "${CABAL_BOOTSTRAP}" && -z "${CABAL_FROM_GHC}" ]] && ! ghc-sanecabal "${CABAL_MIN_VERSION}"; then
348 kosmikus 1.1 eerror "The package dev-haskell/cabal is not correctly installed for"
349     eerror "the currently active version of ghc ($(ghc-version)). Please"
350 slyfox 1.29 eerror "run haskell-updater or re-build dev-haskell/cabal."
351 kosmikus 1.1 die "cabal is not correctly installed"
352     fi
353 dcoutts 1.4 if [[ -z "${CABAL_HAS_BINARIES}" ]] && [[ -z "${CABAL_HAS_LIBRARIES}" ]]; then
354 slyfox 1.29 eqawarn "QA Notice: Neither bin nor lib are in CABAL_FEATURES."
355 dcoutts 1.4 fi
356 dcoutts 1.3 if [[ -n "${CABAL_UNKNOWN}" ]]; then
357 slyfox 1.29 eqawarn "QA Notice: Unknown entry in CABAL_FEATURES: ${CABAL_UNKNOWN}"
358 dcoutts 1.3 fi
359 kolmodin 1.13 if cabal-is-dummy-lib; then
360     einfo "${P} is included in ghc-${CABAL_CORE_LIB_GHC_PV}, nothing to install."
361     fi
362 kosmikus 1.1 }
363    
364 kolmodin 1.19 haskell-cabal_src_configure() {
365 slyfox 1.29 cabal-is-dummy-lib && return
366    
367     pushd "${S}" > /dev/null
368 kolmodin 1.19
369 slyfox 1.29 cabal-bootstrap
370 slyfox 1.22
371 slyfox 1.29 cabal-configure "$@"
372 kolmodin 1.19
373 slyfox 1.29 popd > /dev/null
374 kolmodin 1.19 }
375    
376     # exported function: nice alias
377     cabal_src_configure() {
378     haskell-cabal_src_configure "$@"
379     }
380    
381 kosmikus 1.1 # exported function: cabal-style bootstrap configure and compile
382     cabal_src_compile() {
383 slyfox 1.24 # it's a common mistake when one bumps ebuild to EAPI="2" (and upper)
384     # and forgets to separate src_compile() to src_configure()/src_compile().
385     # Such error leads to default src_configure and we lose all passed flags.
386     if ! has "${EAPI:-0}" 0 1; then
387     local passed_flag
388     for passed_flag in "$@"; do
389     [[ ${passed_flag} == --flags=* ]] && \
390 slyfox 1.29 eqawarn "QA Notice: Cabal option '${passed_flag}' has effect only in src_configure()"
391 slyfox 1.24 done
392     fi
393    
394 slyfox 1.29 cabal-is-dummy-lib && return
395    
396     has src_configure ${HASKELL_CABAL_EXPF} || haskell-cabal_src_configure "$@"
397     cabal-build
398 kosmikus 1.1
399 slyfox 1.29 if [[ -n "${CABAL_USE_HADDOCK}" ]] && use doc; then
400     if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
401     # hscolour and haddock
402     cabal-hscolour-haddock
403 kolmodin 1.21 else
404 slyfox 1.29 # just haddock
405     cabal-haddock
406     fi
407     else
408     if [[ -n "${CABAL_USE_HSCOLOUR}" ]] && use hscolour; then
409     # just hscolour
410     cabal-hscolour
411 kolmodin 1.13 fi
412 kosmikus 1.1 fi
413     }
414 kolmodin 1.16
415 kosmikus 1.1 haskell-cabal_src_compile() {
416 kolmodin 1.19 pushd "${S}" > /dev/null
417    
418     cabal_src_compile "$@"
419    
420     popd > /dev/null
421     }
422    
423     haskell-cabal_src_test() {
424     pushd "${S}" > /dev/null
425    
426 kolmodin 1.20 if cabal-is-dummy-lib; then
427     einfo ">>> No tests for dummy library: ${CATEGORY}/${PF}"
428     else
429     einfo ">>> Test phase [cabal test]: ${CATEGORY}/${PF}"
430 slyfox 1.26 set -- test "$@"
431     echo ./setup "$@"
432     ./setup "$@" || die "cabal test failed"
433 kolmodin 1.20 fi
434 kolmodin 1.19
435     popd > /dev/null
436 kosmikus 1.1 }
437    
438     # exported function: cabal-style copy and register
439     cabal_src_install() {
440 slyfox 1.23 has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
441    
442 slyfox 1.29 if ! cabal-is-dummy-lib; then
443 kolmodin 1.13 cabal-copy
444     cabal-pkg
445 slyfox 1.29 fi
446 kosmikus 1.1
447 slyfox 1.29 # create a dummy local package conf file for haskell-updater
448     # if it does not exist (dummy libraries and binaries w/o libraries)
449     local ghc_confdir_with_prefix="$(ghc-confdir)"
450     # remove EPREFIX
451     dodir ${ghc_confdir_with_prefix#${EPREFIX}}
452     local conf_file="${D}/$(ghc-confdir)/$(ghc-localpkgconf)"
453     [[ -e $conf_file ]] || echo '[]' > "$conf_file" || die
454 kosmikus 1.1 }
455 kolmodin 1.19
456 kosmikus 1.1 haskell-cabal_src_install() {
457 kolmodin 1.19 pushd "${S}" > /dev/null
458    
459 kosmikus 1.1 cabal_src_install
460 kolmodin 1.19
461     popd > /dev/null
462 kosmikus 1.1 }
463    
464 kolmodin 1.19 # ebuild.sh:use_enable() taken as base
465     #
466     # Usage examples:
467     #
468     # CABAL_CONFIGURE_FLAGS=$(cabal_flag gui)
469     # leads to "--flags=gui" or "--flags=-gui" (useflag 'gui')
470     #
471     # CABAL_CONFIGURE_FLAGS=$(cabal_flag gtk gui)
472     # also leads to "--flags=gui" or " --flags=-gui" (useflag 'gtk')
473     #
474     cabal_flag() {
475     if [[ -z "$1" ]]; then
476     echo "!!! cabal_flag() called without a parameter." >&2
477     echo "!!! cabal_flag() <USEFLAG> [<cabal_flagname>]" >&2
478     return 1
479     fi
480    
481     local UWORD=${2:-$1}
482    
483     if use "$1"; then
484     echo "--flags=${UWORD}"
485     else
486     echo "--flags=-${UWORD}"
487     fi
488    
489     return 0
490     }

  ViewVC Help
Powered by ViewVC 1.1.20