URL:
<http://gna.org/bugs/?18872>
Summary: Freeciv does not compile with clang
Project: Freeciv
Submitted by: doctorjlowe
Submitted on: Thu 27 Oct 2011 09:25:41 AM PDT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Status: None
Assigned to: None
Originator Email:
Open/Closed: Open
Release: 2.3.0
Discussion Lock: Any
Operating System: Mac OS
Planned Release:
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Details:
Clang is now the default compiler on OSX 10.7 A.K.A Lion, and also OSX 10.6
A.K.A Snow Leopard with the optional XCode 4.2 update. On those systems, an
ordinary make fails like so:
/bin/sh ../libtool --preserve-dup-deps --silent --tag=CC --mode=compile
gcc -DHAVE_CONFIG_H -I. -I.. -I/sw/include
-DLOCALEDIR="\"/sw/share/locale\"" -DBINDIR="\"/sw/bin\""
-DDEFAULT_DATA_PATH="\".:data:~/.freeciv/2.3:/sw/share/freeciv\""
-DDEFAULT_SAVES_PATH="\"\""
-DDEFAULT_SCENARIO_PATH="\".:data/scenario:~/.freeciv/2.3/scenarios:~/.freeciv/scenarios:/sw/share/freeciv/scenario\""
-Wall -Wpointer-arith -Wcast-align -Wmissing-prototypes
-Wmissing-declarations -Wno-unused-but-set-variable -Werror -g -O2
-fsigned-char -c -o shared.lo shared.c
shared.c:370:36: error: comparison of unsigned expression >= 0 is always
true [-Werror,-Wtautological-compare]
while (mantissa != 0 && exponent >= 0) {
~~~~~~~~ ^ ~
/bin/sh ../libtool --preserve-dup-deps --silent --tag=CC --mode=compile
gcc -DHAVE_CONFIG_H -I. -I.. -I/sw/include
-DLOCALEDIR="\"/sw/share/locale\"" -DBINDIR="\"/sw/bin\""
-DDEFAULT_DATA_PATH="\".:data:~/.freeciv/2.3:/sw/share/freeciv\""
-DDEFAULT_SAVES_PATH="\"\""
-DDEFAULT_SCENARIO_PATH="\".:data/scenario:~/.freeciv/2.3/scenarios:~/.freeciv/scenarios:/sw/share/freeciv/scenario\""
-Wall -Wpointer-arith -Wcast-align -Wmissing-prototypes
-Wmissing-declarations -Wno-unused-but-set-variable -Werror -g -O2
-fsigned-char -c -o md5.lo md5.c
md5.c:148:5: error: cast from 'const unsigned char *' to 'MD5_u32plus *'
(aka 'unsigned int *') increases required alignment from 1 to 4
[-Werror,-Wcast-align]
STEP(F, a, b, c, d, SET(0), 0xd76aa478, 7)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The workaround for now is to force usage of the less strict llvm compiler,
though i expect clang usage is going to become more widespread.
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