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Stop "Possible use before definition" warning following change 24997
[perl5.git] / hints / darwin.sh
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1##
2# Darwin (Mac OS) hints
835bc3f3 3# Wilfredo Sanchez <wsanchez@wsanchez.net>
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4##
5
6##
7# Paths
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8##
9
10# Configure hasn't figured out the version number yet. Bummer.
11perl_revision=`awk '/define[ ]+PERL_REVISION/ {print $3}' $src/patchlevel.h`
12perl_version=`awk '/define[ ]+PERL_VERSION/ {print $3}' $src/patchlevel.h`
13perl_subversion=`awk '/define[ ]+PERL_SUBVERSION/ {print $3}' $src/patchlevel.h`
14version="${perl_revision}.${perl_version}.${perl_subversion}"
15
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16# Pretend that Darwin doesn't know about those system calls [perl #24122]
17d_setregid='undef'
18d_setreuid='undef'
19d_setrgid='undef'
20d_setruid='undef'
21
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22# This was previously used in all but causes three cases
23# (no -Ddprefix=, -Dprefix=/usr, -Dprefix=/some/thing/else)
24# but that caused too much grief.
25# vendorlib="/System/Library/Perl/${version}"; # Apple-supplied modules
26
27# BSD paths
28case "$prefix" in
29'') # Default install; use non-system directories
30 prefix='/usr/local';
31 siteprefix='/usr/local';
32 ;;
33'/usr') # We are building/replacing the built-in perl
34 prefix='/';
35 installprefix='/';
36 bin='/usr/bin';
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37 siteprefix='/usr/local';
38 # We don't want /usr/bin/HEAD issues.
39 sitebin='/usr/local/bin';
40 sitescript='/usr/local/bin';
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41 installusrbinperl='define'; # You knew what you were doing.
42 privlib="/System/Library/Perl/${version}";
43 sitelib="/Library/Perl/${version}";
44 vendorprefix='/';
45 usevendorprefix='define';
46 vendorbin='/usr/bin';
47 vendorscript='/usr/bin';
48 vendorlib="/Network/Library/Perl/${version}";
49 # 4BSD uses ${prefix}/share/man, not ${prefix}/man.
50 man1dir='/usr/share/man/man1';
51 man3dir='/usr/share/man/man3';
b69885a6 52 # But users' installs shouldn't touch the system man pages.
8d4e7e39 53 # Transient obsoleted style.
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54 siteman1='/usr/local/share/man/man1';
55 siteman3='/usr/local/share/man/man3';
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56 # New style.
57 siteman1dir='/usr/local/share/man/man1';
58 siteman3dir='/usr/local/share/man/man3';
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59 ;;
60 *) # Anything else; use non-system directories, use Configure defaults
61 ;;
62esac
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63
64##
65# Tool chain settings
66##
67
68# Since we can build fat, the archname doesn't need the processor type
69archname='darwin';
70
71# nm works.
72usenm='true';
73
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74case "$optimize" in
75'')
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76# Optimizing for size also mean less resident memory usage on the part
77# of Perl. Apple asserts that this is a more important optimization than
78# saving on CPU cycles. Given that memory speed has not increased at
79# pace with CPU speed over time (on any platform), this is probably a
80# reasonable assertion.
21328108 81if [ -z "${optimize}" ]; then
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82 case "`${cc:-gcc} -v 2>&1`" in
83 *"gcc version 3."*) optimize='-Os' ;;
84 *) optimize='-O3' ;;
21328108 85 esac
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86else
87 optimize='-O3'
23131aa4 88fi
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89;;
90esac
f556e5b9 91
21328108 92# -fno-common because common symbols are not allowed in MH_DYLIB
6239f2da 93# -DPERL_DARWIN: apparently the __APPLE__ is not sanctioned by Apple
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94# as the way to differentiate Mac OS X. (The official line is that
95# *no* cpp symbol does differentiate Mac OS X.)
00e89ad4 96ccflags="${ccflags} -fno-common -DPERL_DARWIN"
f556e5b9 97
4e644a1e 98# At least on Darwin 1.3.x:
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99#
100# # define INT32_MIN -2147483648
101# int main () {
102# double a = INT32_MIN;
103# printf ("INT32_MIN=%g\n", a);
104# return 0;
105# }
106# will output:
107# INT32_MIN=2.14748e+09
108# Note that the INT32_MIN has become positive.
109# INT32_MIN is set in /usr/include/stdint.h by:
110# #define INT32_MIN -2147483648
111# which seems to break the gcc. Defining INT32_MIN as (-2147483647-1)
112# seems to work. INT64_MIN seems to be similarly broken.
113# -- Nicholas Clark, Ken Williams, and Edward Moy
114#
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115# This seems to have been fixed since at least Mac OS X 10.1.3,
116# stdint.h defining INT32_MIN as (-INT32_MAX-1)
117# -- Edward Moy
118#
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119case "$(grep '^#define INT32_MIN' /usr/include/stdint.h)" in
120 *-2147483648) ccflags="${ccflags} -DINT32_MIN_BROKEN -DINT64_MIN_BROKEN" ;;
65fe0b2a 121esac
ccf87481 122
21328108 123# Avoid Apple's cpp precompiler, better for extensions
8f4f83ba 124cppflags="${cppflags} -no-cpp-precomp"
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125
126# This is necessary because perl's build system doesn't
127# apply cppflags to cc compile lines as it should.
128ccflags="${ccflags} ${cppflags}"
4f8ddd77 129
00371ed5 130# Known optimizer problems.
f5520784 131case "`cc -v 2>&1`" in
21328108 132 *"3.1 20020105"*) toke_cflags='optimize=""' ;;
00371ed5 133esac
2ece6c11 134
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135# Shared library extension is .dylib.
136# Bundle extension is .bundle.
137ld='cc';
138so='dylib';
139dlext='bundle';
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140usedl='define';
141
142# 10.4 can use dlopen.
143# 10.4 broke poll().
144case "$osvers" in
145[1-7].*)
146 dlsrc='dl_dyld.xs';
147 ;;
148*)
149 dlsrc='dl_dlopen.xs';
150 d_poll='undef';
151 i_poll='undef';
152 ;;
153esac
154
c374061b 155cccdlflags=' '; # space, not empty, because otherwise we get -fpic
21328108 156# Perl bundles do not expect two-level namespace, added in Darwin 1.4.
986530ea 157# But starting from perl 5.8.1/Darwin 7 the default is the two-level.
f29f446b 158case "$osvers" in
cb3fc426 1591.[0-3].*)
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160 lddlflags="${ldflags} -bundle -undefined suppress"
161 ;;
1621.*)
163 ldflags="${ldflags} -flat_namespace"
164 lddlflags="${ldflags} -bundle -undefined suppress"
165 ;;
166[2-6].*)
167 ldflags="${ldflags} -flat_namespace"
168 lddlflags="${ldflags} -bundle -undefined suppress"
169 ;;
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170*)
171 lddlflags="${ldflags} -bundle -undefined dynamic_lookup"
986530ea 172 case "$ld" in
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173 *MACOSX_DEVELOPMENT_TARGET*) ;;
174 *) ld="env MACOSX_DEPLOYMENT_TARGET=10.3 ${ld}" ;;
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175 esac
176 ;;
f29f446b 177esac
f556e5b9 178ldlibpthname='DYLD_LIBRARY_PATH';
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179
180# useshrplib=true results in much slower startup times.
763754f3 181# 'false' is the default value. Use Configure -Duseshrplib to override.
f556e5b9 182
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183cat > UU/archname.cbu <<'EOCBU'
184# This script UU/archname.cbu will get 'called-back' by Configure
185# after it has otherwise determined the architecture name.
186case "$ldflags" in
986530ea 187*"-flat_namespace"*) ;; # Backward compat, be flat.
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188# If we are using two-level namespace, we will munge the archname to show it.
189*) archname="${archname}-2level" ;;
190esac
191EOCBU
192
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193##
194# System libraries
195##
196
197# vfork works
198usevfork='true';
199
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200# malloc wrap works
201case "$usemallocwrap" in
202'') usemallocwrap='define' ;;
203esac
204
e88d9d51 205# our malloc works (but allow users to override)
ec5333ab 206case "$usemymalloc" in
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207'') usemymalloc='n' ;;
208esac
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209# However sbrk() returns -1 (failure) somewhere in lib/unicore/mktables at
210# around 14M, so we need to use system malloc() as our sbrk()
211malloc_cflags='ccflags="-DUSE_PERL_SBRK -DPERL_SBRK_VIA_MALLOC $ccflags"'
2ece6c11 212
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213# Locales aren't feeling well.
214LC_ALL=C; export LC_ALL;
14c11978 215LANG=C; export LANG;
d235852b 216
2590a1d7 217#
14c11978 218# The libraries are not threadsafe as of OS X 10.1.
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219#
220# Fix when Apple fixes libc.
221#
3db8f154 222case "$usethreads$useithreads" in
21328108 223 *define*)
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224 case "$osvers" in
225 [12345].*) cat <<EOM >&4
226
227
2590a1d7 228
4f8ddd77 229*** Warning, there might be problems with your libraries with
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230*** regards to threading. The test ext/threads/t/libc.t is likely
231*** to fail.
4f8ddd77 232
2590a1d7 233EOM
21328108 234 ;;
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235 *) usereentrant='define';;
236 esac
237
2590a1d7 238esac
835bc3f3 239
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240# Fink can install a GDBM library that claims to have the ODBM interfaces
241# but Perl dynaloader cannot for some reason use that library. We don't
242# really need ODBM_FIle, though, so let's just hint ODBM away.
243i_dbm=undef;
244
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245##
246# Build process
247##
248
249# Case-insensitive filesystems don't get along with Makefile and
250# makefile in the same place. Since Darwin uses GNU make, this dodges
251# the problem.
252firstmakefile=GNUmakefile;