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|
# javacomp.m4 serial 19
dnl Copyright (C) 2001-2003, 2006-2007, 2009-2023 Free Software Foundation,
dnl Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
# Prerequisites of javacomp.sh.
# gt_JAVACOMP([source-version], [target-version])
# Sets HAVE_JAVACOMP to nonempty if javacomp.sh will allow Java source code
# according to source-version to be compiled to Java bytecode classes in the
# target-version format.
#
# source-version can be: support for
# 1.3 inner classes
# 1.4 assert keyword
# 1.5 generic classes and methods
# 1.6 (not supported)
# 1.7 switch(string)
# 1.8 lambdas
# 9 private interface methods
# 10 type inference for local variables
# 11 'var' in parameters of lambda expressions
# Instead of source-version 1.6, use 1.5, since Java 6 did not introduce any
# language changes. See
# https://docs.oracle.com/javase/8/docs/technotes/guides/language/enhancements.html
#
# target-version can be: classfile version:
# 1.1 45.3
# 1.2 46.0
# 1.3 47.0
# 1.4 48.0
# 1.5 49.0
# 1.6 50.0
# 1.7 51.0
# 1.8 52.0
# 9 53.0
# 10 54.0
# 11 55.0
# The classfile version of a .class file can be determined through the "file"
# command. More portably, the classfile major version can be determined through
# "od -A n -t d1 -j 7 -N 1 classfile".
# target-version can also be omitted. In this case, the required target-version
# is determined from the found JVM (see macro gt_JAVAEXEC):
# target-version for JVM
# 1.1 JDK 1.1, jview
# 1.2 JDK/JRE 1.2
# 1.3 JDK/JRE 1.3, gij 3.3, 3.4
# 1.4 JDK/JRE 1.4, gij 4.0 ... 4.2
# 1.5 JDK/JRE 5, gij 4.3 ... 6
# 1.6 JDK/JRE 6
# 1.7 JDK/JRE 7
# 1.8 JDK/JRE 8
# 9 JDK/JRE 9
# 10 JDK/JRE 10
# 11 JDK/JRE 11
# Note: gij >= 3.3 can in some cases handle classes compiled with -target 1.4,
# and gij >= 4.1 can in some cases partially handle classes compiled with
# -target 1.5, but I have no idea how complete this support is. Similarly,
# gcj >= 4.3 supports -ftarget=1.6, and gij >= 4.3 can in some cases handle
# classes compiled with -target 1.6.
#
# Specifying target-version is useful when building a library (.jar) that is
# useful outside the given package. Omitting target-version is useful when
# building an application.
#
# It is unreasonable to ask for:
# - target-version < 1.4 with source-version >= 1.4, or
# - target-version < 1.5 with source-version >= 1.5, or
# - target_version < 1.6 with source_version >= 1.6, or
# - target_version < 1.7 with source_version >= 1.7, or
# - target_version < 1.8 with source_version >= 1.8, or
# - target_version < 9 with source_version >= 9, or
# - target_version < 10 with source_version >= 10, or
# - target_version < 11 with source_version >= 11,
# because even Sun's/Oracle's javac doesn't support these combinations.
#
# It is redundant to ask for a target-version > source-version, since the
# smaller target-version = source-version will also always work and newer JVMs
# support the older target-versions too. Except for the cases
# - target-version = 1.4, source-version = 1.3, which allows gcj versions 3.0
# to 3.2 to be used,
# - target-version = 1.6, source-version = 1.5, which allows gcj versions
# >= 4.3 to be used.
AC_DEFUN([gt_JAVACOMP],
[
m4_if([$2], [], [AC_REQUIRE([gt_JAVAEXEC])], [])
AC_EGREP_CPP([yes], [
#if defined _WIN32 || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
yes
#endif
], CLASSPATH_SEPARATOR=';', CLASSPATH_SEPARATOR=':')
source_version=$1
test -n "$source_version" || {
AC_MSG_ERROR([missing source-version argument to gt_@&t@JAVACOMP])
}
m4_if([$2], [],
[if test -n "$HAVE_JAVAEXEC"; then
dnl Use $CONF_JAVA to determine the JVM's version.
changequote(,)dnl
cat > conftestver.java <<EOF
public class conftestver {
public static void main (String[] args) {
System.out.println(System.getProperty("java.specification.version"));
}
}
EOF
changequote([,])dnl
dnl A precompiled version of conftestver.java, compiled with
dnl "javac -target 1.1". This avoids having to compile conftestver.java
dnl during each test for a suitable Java compiler.
dnl For the conversion from binary to this ASCII encapsulation, avoiding
dnl to assume the presence of uudecode, use the command
dnl $ od -A n -t o1 < conftestver.class | tr ' ' '\012'| sort | uniq | sed -e '/^$/d' -e 's,^,\\,' | tr -d '\012'
dnl and the long tr command in opposite direction.
dnl Finally move the position corresponding to \055 to the last position,
dnl to work around a coreutils-5.x bug.
echo 'yzwx!$!I!D,!)!3+!4!5*!6,!4!7,!8!9)!:)!;"!(MeienN"!$FGW"!%Ojab"!2QeibRohZblVYZgb"!%hYei"!9FXQfYpYKgYidKUnleidLGW"!,Ujol_bPegb"!3_jicnbmnpblJfYpY/!*!+)!</!=!>"!=fYpYJmkb_ece_YnejiJpblmeji/!?!@)!A/!B!C"!._jicnbmnpbl"!3fYpYKgYidKSZfb_n"!3fYpYKgYidKUqmnbh"!$jon"!8QfYpYKejKTleinUnlbYhL"!.dbnTljkblnq"!EFQfYpYKgYidKUnleidLGQfYpYKgYidKUnleidL"!6fYpYKejKTleinUnlbYh"!)kleingi"!8FQfYpYKgYidKUnleidLGW!D!(!)!!!!!#!"!*!+!"!,!!!@!"!"!!!&Hu!"r!!!"!.!!!(!"!!!"!+!/!0!"!,!!!F!#!"!!!/s!#5$v!%t!&r!!!"!.!!!,!#!!!$!.!%!"!1!!!#!2' \
| tr -d '\012\015' \
| tr '!"#$%&()*+,./0123456789:;<=>?@ABCDEFGHJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyzI' '\000\001\002\003\004\005\006\007\010\011\012\013\014\015\016\017\020\021\022\023\024\025\026\027\030\031\032\033\034\035\036\037\040\041\046\050\051\052\056\057\073\074\076\103\106\114\116\117\120\123\124\126\133\141\142\143\144\145\146\147\151\152\154\155\156\157\160\162\163\164\165\166\171\261\262\266\267\270\272\276\312\376\055' \
> conftestver.class
target_version=`{
unset JAVA_HOME
echo "$as_me:__oline__: CLASSPATH=.${CLASSPATH:+$CLASSPATH_SEPARATOR$CLASSPATH} $CONF_JAVA conftestver" >&AS_MESSAGE_LOG_FD
CLASSPATH=.${CLASSPATH:+$CLASSPATH_SEPARATOR$CLASSPATH} $CONF_JAVA conftestver 2>&AS_MESSAGE_LOG_FD
}`
case "$target_version" in
1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 | 9 | 10 | 11) ;;
12 | 13 | 14 | 15 | 16 | 17)
dnl Assume that these (not yet released) Java versions will behave
dnl like the preceding ones.
target_version=11 ;;
null)
dnl JDK 1.1.X returns null.
target_version=1.1 ;;
*) AC_MSG_WARN([unknown target-version $target_version, please update gt_@&t@JAVACOMP macro])
target_version=1.1 ;;
esac
else
target_version="1.1"
fi
],
[target_version=$2])
case "$source_version" in
1.3) goodcode='class conftest {}'
failcode='class conftestfail { static { assert(true); } }' ;;
1.4) goodcode='class conftest { static { assert(true); } }'
failcode='class conftestfail<T> { T foo() { return null; } }' ;;
1.5) goodcode='class conftest<T> { T foo() { return null; } }'
failcode='class conftestfail { void foo () { switch ("A") {} } }' ;;
1.7) goodcode='class conftest { void foo () { switch ("A") {} } }'
failcode='class conftestfail { void foo () { Runnable r = () -> {}; } }' ;;
1.8) goodcode='class conftest { void foo () { Runnable r = () -> {}; } }'
failcode='interface conftestfail { private void foo () {} }' ;;
9) goodcode='interface conftest { private void foo () {} }'
failcode='class conftestfail { public void m() { var i = new Integer(0); } }' ;;
10) goodcode='class conftest { public void m() { var i = new Integer(0); } }'
failcode='class conftestfail { Readable r = (var b) -> 0; }' ;;
11) goodcode='class conftest { Readable r = (var b) -> 0; }'
failcode='class conftestfail syntax error' ;;
*) AC_MSG_ERROR([invalid source-version argument to gt_@&t@JAVACOMP: $source_version]) ;;
esac
case "$target_version" in
1.1) cfversion=45 ;;
1.2) cfversion=46 ;;
1.3) cfversion=47 ;;
1.4) cfversion=48 ;;
1.5) cfversion=49 ;;
1.6) cfversion=50 ;;
1.7) cfversion=51 ;;
1.8) cfversion=52 ;;
9) cfversion=53 ;;
10) cfversion=54 ;;
11) cfversion=55 ;;
*) AC_MSG_ERROR([invalid target-version argument to gt_@&t@JAVACOMP: $target_version]) ;;
esac
# Function to output the classfile version of a file (8th byte) in decimal.
if od -A x < /dev/null >/dev/null 2>/dev/null; then
# Use POSIX od.
func_classfile_version ()
{
od -A n -t d1 -j 7 -N 1 "[$]1"
}
else
# Use BSD hexdump.
func_classfile_version ()
{
dd if="[$]1" bs=1 count=1 skip=7 2>/dev/null | hexdump -e '1/1 "%3d "'
echo
}
fi
AC_MSG_CHECKING([for Java compiler])
dnl
dnl The support of GNU gcj for target-version and source-version:
dnl
dnl gcj 3.0.4 to 4.2 does not have a way to specify the target-version.
dnl It always assumes target-version=1.4 but labels the class files as 1.1.
dnl One consequence of this is that gcj compiles GetURL.java to invalid
dnl bytecode, which crashes with a VerifyError when executed by Sun Java
dnl 1.3.1. The bug is registered as java/7066, see
dnl https://gcc.gnu.org/bugzilla/show_bug.cgi?id=7066
dnl gcj 4.3 and newer has an option -ftarget=1.X; the maximum supported
dnl target-version is 1.6.
dnl
dnl For gcj < 3.3, the source-version always is 1.3.
dnl For 3.3 <= gcj < 4.3, the source-version defaults to 1.4; option
dnl "-fno-assert" switches to source-version 1.3.
dnl gcj >= 4.3 has an option -fsource=1.X.
dnl
dnl The support of Sun/Oracle javac for target-version and source-version:
dnl
dnl javac 1.3: -target 1.1 1.2 1.3 default: 1.1
dnl source always: 1.3
dnl
dnl javac 1.4: -target 1.1 1.2 1.3 1.4 default: 1.2
dnl -source 1.3 1.4 default: 1.3
dnl -target 1.1/1.2/1.3 only possible with -source 1.3 or no -source
dnl
dnl javac 1.5: -target 1.1 1.2 1.3 1.4 1.5 default: 1.5
dnl -source 1.3 1.4 1.5 default: 1.5
dnl -target 1.1/1.2/1.3 only possible with -source 1.3
dnl -target 1.4 only possible with -source 1.3/1.4
dnl
dnl javac 1.6: -target 1.1 1.2 1.3 1.4 1.5 1.6 default: 1.6
dnl -source 1.3 1.4 1.5 1.6 default: 1.5
dnl -target 1.1/1.2/1.3 only possible with -source 1.3
dnl -target 1.4 only possible with -source 1.3/1.4
dnl -target 1.5 only possible with -source 1.3/1.4/1.5 or no -source
dnl
dnl javac 1.7: -target 1.1 1.2 1.3 1.4 1.5 1.6 1.7 default: 1.7
dnl -source 1.3 1.4 1.5 1.6 1.7 default: 1.7
dnl -target 1.1/1.2/1.3 only possible with -source 1.3
dnl -target 1.4 only possible with -source 1.3/1.4
dnl -target 1.5 only possible with -source 1.3/1.4/1.5
dnl -target 1.6 only possible with -source 1.3/1.4/1.5/1.6
dnl
dnl javac 1.8: -target 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 default: 1.8
dnl -source 1.3 1.4 1.5 1.6 1.7 1.8 default: 1.8
dnl -target 1.1/1.2/1.3 only possible with -source 1.3
dnl -target 1.4 only possible with -source 1.3/1.4
dnl -target 1.5 only possible with -source 1.3/1.4/1.5
dnl -target 1.6 only possible with -source 1.3/1.4/1.5/1.6
dnl -target 1.7 only possible with -source 1.3/1.4/1.5/1.6/1.7
dnl
dnl javac 9: -target 1.6 1.7 1.8 9 default: 9
dnl -source 1.6 1.7 1.8 9 default: 9
dnl -target 1.6 only possible with -source 1.6
dnl -target 1.7 only possible with -source 1.6/1.7
dnl -target 1.8 only possible with -source 1.6/1.7/1.8
dnl
dnl javac 10: -target 1.6 1.7 1.8 9 10 default: 10
dnl -source 1.6 1.7 1.8 9 10 default: 10
dnl -target 1.6 only possible with -source 1.6
dnl -target 1.7 only possible with -source 1.6/1.7
dnl -target 1.8 only possible with -source 1.6/1.7/1.8
dnl -target 9 only possible with -source 1.6/1.7/1.8/9
dnl
dnl javac 11: -target 1.6 1.7 1.8 9 10 11 default: 11
dnl -source 1.6 1.7 1.8 9 10 11 default: 11
dnl -target 1.6 only possible with -source 1.6
dnl -target 1.7 only possible with -source 1.6/1.7
dnl -target 1.8 only possible with -source 1.6/1.7/1.8
dnl -target 9 only possible with -source 1.6/1.7/1.8/9
dnl -target 10 only possible with -source 1.6/1.7/1.8/9/10
dnl
dnl The support of jikes for target-version and source-version:
dnl
dnl jikes 1.14 does not have a way to specify the target-version. It
dnl always assumes target-version=1.1.
dnl
dnl For jikes 1.14, the source-version always is 1.3.
dnl
CONF_JAVAC=
HAVE_JAVAC_ENVVAR=
HAVE_GCJ_C=
HAVE_JAVAC=
HAVE_JIKES=
HAVE_JAVACOMP=
changequote(,)dnl
cat > conftestlib.java <<EOF
public class conftestlib {
public static void main (String[] args) {
}
}
EOF
changequote([,])dnl
echo "$goodcode" > conftest.java
echo "$failcode" > conftestfail.java
dnl If the user has set the JAVAC environment variable, use that, if it
dnl satisfies the constraints (possibly after adding -target and -source
dnl options).
if test -n "$JAVAC"; then
dnl Try the original $JAVAC.
if $JAVAC --version 2>/dev/null | sed -e 1q | grep gcj > /dev/null; then
dnl It's a version of gcj.
changequote(,)dnl
if $JAVAC --version 2>/dev/null | sed -e 's,^[^0-9]*,,' -e 1q | sed -e '/^4\.[012]/d' | grep '^[4-9]' >/dev/null; then
changequote([,])dnl
dnl It's a version of gcj >= 4.3. Assume the classfile versions are correct.
dnl Try $JAVAC.
rm -f conftest.class
if { echo "$as_me:__oline__: $JAVAC -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
dnl Try adding -fsource option if it is useful.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: $JAVAC -fsource=$source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -fsource="$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
&& { echo "$as_me:__oline__: $JAVAC -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftestfail.class \
&& ! { echo "$as_me:__oline__: $JAVAC -fsource=$source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -fsource="$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
CONF_JAVAC="$JAVAC -fsource=$source_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
else
CONF_JAVAC="$JAVAC"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
else
dnl Try with -fsource and -ftarget options.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: $JAVAC -fsource=$source_version -ftarget=$target_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -fsource="$source_version" -ftarget="$target_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
CONF_JAVAC="$JAVAC -fsource=$source_version -ftarget=$target_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
fi
else
dnl It's a version of gcj < 4.3. Ignore the version of conftest.class.
if test "$target_version" = 1.4 && test "$source_version" = 1.4; then
dnl Try $JAVAC.
rm -f conftest.class
if { echo "$as_me:__oline__: $JAVAC -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class; then
CONF_JAVAC="$JAVAC"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
else
if test "$target_version" = 1.4 && test "$source_version" = 1.3; then
dnl Try $JAVAC and "$JAVAC -fno-assert". But add -fno-assert only if
dnl it makes a difference. (It could already be part of $JAVAC.)
javac_works=
rm -f conftest.class
if { echo "$as_me:__oline__: $JAVAC -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class; then
javac_works=1
fi
javac_noassert_works=
rm -f conftest.class
if { echo "$as_me:__oline__: $JAVAC -fno-assert -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -fno-assert -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class; then
javac_noassert_works=1
fi
if test -n "$javac_works" && test -n "$javac_noassert_works"; then
rm -f conftestfail.class
if { echo "$as_me:__oline__: $JAVAC -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftestfail.class \
&& ! { echo "$as_me:__oline__: $JAVAC -fno-assert -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -fno-assert -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
dnl "$JAVAC -fno-assert" works better than $JAVAC.
javac_works=
fi
fi
if test -n "$javac_works"; then
CONF_JAVAC="$JAVAC"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
else
if test -n "$javac_noassert_works"; then
CONF_JAVAC="$JAVAC -fno-assert"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
fi
fi
fi
fi
else
dnl It's not gcj. Assume the classfile versions are correct.
dnl Try $JAVAC.
dnl The javac option '-source 1.5' has the same meaning as '-source 1.6',
dnl but since Java 9 supports only the latter, prefer the latter if a
dnl target_version >= 1.6 is requested.
if test "$source_version" = 1.5; then
case "$target_version" in
1.1 | 1.2 | 1.3 | 1.4 | 1.5) ;;
*) source_version='1.6' ;;
esac
fi
rm -f conftest.class
if { echo "$as_me:__oline__: $JAVAC -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
dnl Try adding -source option if it is useful.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: $JAVAC -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
&& { echo "$as_me:__oline__: $JAVAC -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftestfail.class \
&& ! { echo "$as_me:__oline__: $JAVAC -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
CONF_JAVAC="$JAVAC -source $source_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
else
CONF_JAVAC="$JAVAC"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
else
dnl Try with -target option alone. (Sun javac 1.3.1 has the -target
dnl option but no -source option.)
rm -f conftest.class
if { echo "$as_me:__oline__: $JAVAC -target $target_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -target "$target_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
dnl Try adding -source option if it is useful.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: $JAVAC -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
&& { echo "$as_me:__oline__: $JAVAC -target $target_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -target "$target_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftestfail.class \
&& ! { echo "$as_me:__oline__: $JAVAC -target $target_version -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
$JAVAC -target "$target_version" -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
CONF_JAVAC="$JAVAC -target $target_version -source $source_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
else
CONF_JAVAC="$JAVAC -target $target_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
else
dnl Maybe this -target option requires a -source option? Try with
dnl -target and -source options. (Supported by Sun javac 1.4 and
dnl higher.)
rm -f conftest.class
if { echo "$as_me:__oline__: $JAVAC -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
$JAVAC -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
CONF_JAVAC="$JAVAC -target $target_version -source $source_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
fi
fi
fi
fi
if test -z "$HAVE_JAVACOMP"; then
pushdef([AC_MSG_CHECKING],[:])dnl
pushdef([AC_CHECKING],[:])dnl
pushdef([AC_MSG_RESULT],[:])dnl
AC_CHECK_PROG([HAVE_GCJ_IN_PATH], [gcj], [yes])
AC_CHECK_PROG([HAVE_JAVAC_IN_PATH], [javac], [yes])
AC_CHECK_PROG([HAVE_JIKES_IN_PATH], [jikes], [yes])
popdef([AC_MSG_RESULT])dnl
popdef([AC_CHECKING])dnl
popdef([AC_MSG_CHECKING])dnl
if test -z "$HAVE_JAVACOMP" && test -n "$HAVE_GCJ_IN_PATH"; then
dnl Test for a good gcj version (>= 3.0).
changequote(,)dnl
if gcj --version 2>/dev/null | sed -e 's,^[^0-9]*,,' -e 1q | sed -e '/^3\.[01]/d' | grep '^[3-9]' >/dev/null; then
changequote([,])dnl
dnl See if libgcj.jar is well installed.
if { echo "$as_me:__oline__: gcj -C -d . conftestlib.java" >&AS_MESSAGE_LOG_FD
gcj -C -d . conftestlib.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
dnl OK, gcj works.
changequote(,)dnl
if gcj --version 2>/dev/null | sed -e 's,^[^0-9]*,,' -e 1q | sed -e '/^4\.[012]/d' | grep '^[4-9]' >/dev/null; then
changequote([,])dnl
dnl It's a version of gcj >= 4.3. Assume the classfile versions are correct.
dnl Try gcj.
rm -f conftest.class
if { echo "$as_me:__oline__: gcj -C -d . conftest.java" >&AS_MESSAGE_LOG_FD
gcj -C -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
dnl Try adding -fsource option if it is useful.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: gcj -C -fsource=$source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
gcj -C -fsource="$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
&& { echo "$as_me:__oline__: gcj -C -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
gcj -C -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftestfail.class \
&& ! { echo "$as_me:__oline__: gcj -C -fsource=$source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
gcj -C -fsource="$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
CONF_JAVAC="gcj -C -fsource=$source_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
else
CONF_JAVAC="gcj -C"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
else
dnl Try with -fsource and -ftarget options.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: gcj -C -fsource=$source_version -ftarget=$target_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
gcj -C -fsource="$source_version" -ftarget="$target_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
CONF_JAVAC="gcj -C -fsource=$source_version -ftarget=$target_version"
HAVE_JAVAC_ENVVAR=1
HAVE_JAVACOMP=1
fi
fi
else
dnl It's a version of gcj < 4.3. Ignore the version of conftest.class.
dnl Now test whether it supports the desired target-version and
dnl source-version.
if test "$target_version" = 1.4 && test "$source_version" = 1.4; then
rm -f conftest.class
if { echo "$as_me:__oline__: gcj -C -d . conftest.java" >&AS_MESSAGE_LOG_FD
gcj -C -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class; then
CONF_JAVAC="gcj -C"
HAVE_GCJ_C=1
HAVE_JAVACOMP=1
fi
else
if test "$target_version" = 1.4 && test "$source_version" = 1.3; then
dnl Try gcj and "gcj -fno-assert". But add -fno-assert only if
dnl it works (not gcj < 3.3).
rm -f conftest.class
if { echo "$as_me:__oline__: gcj -C -fno-assert -d . conftest.java" >&AS_MESSAGE_LOG_FD
gcj -C -fno-assert -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class; then
CONF_JAVAC="gcj -C -fno-assert"
HAVE_GCJ_C=1
HAVE_JAVACOMP=1
else
rm -f conftest.class
if { echo "$as_me:__oline__: gcj -C -d . conftest.java" >&AS_MESSAGE_LOG_FD
gcj -C -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class; then
CONF_JAVAC="gcj -C"
HAVE_GCJ_C=1
HAVE_JAVACOMP=1
fi
fi
fi
fi
fi
fi
fi
fi
if test -z "$HAVE_JAVACOMP" && test -n "$HAVE_JAVAC_IN_PATH"; then
dnl Test whether javac is usable.
if { javac -version >/dev/null 2>/dev/null || test $? -le 2; } \
&& ( if javac -help 2>&1 >/dev/null | grep at.dms.kjc.Main >/dev/null && javac -help 2>/dev/null | grep 'released.*2000' >/dev/null ; then exit 1; else exit 0; fi ); then
dnl OK, javac works.
dnl The javac option '-source 1.5' has the same meaning as '-source 1.6',
dnl but since Java 9 supports only the latter, prefer the latter if a
dnl target_version >= 1.6 is requested.
if test "$source_version" = 1.5; then
case "$target_version" in
1.1 | 1.2 | 1.3 | 1.4 | 1.5) ;;
*) source_version='1.6' ;;
esac
fi
dnl Now test whether it supports the desired target-version and
dnl source-version.
rm -f conftest.class
if { echo "$as_me:__oline__: javac -d . conftest.java" >&AS_MESSAGE_LOG_FD
javac -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
dnl Try adding -source option if it is useful.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: javac -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
javac -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
&& { echo "$as_me:__oline__: javac -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
javac -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftestfail.class \
&& ! { echo "$as_me:__oline__: javac -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
javac -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
CONF_JAVAC="javac -source $source_version"
HAVE_JAVAC=1
HAVE_JAVACOMP=1
else
CONF_JAVAC="javac"
HAVE_JAVAC=1
HAVE_JAVACOMP=1
fi
else
dnl Try with -target option alone. (Sun javac 1.3.1 has the -target
dnl option but no -source option.)
rm -f conftest.class
if { echo "$as_me:__oline__: javac -target $target_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
javac -target "$target_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
dnl Try adding -source option if it is useful.
rm -f conftest.class
rm -f conftestfail.class
if { echo "$as_me:__oline__: javac -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
javac -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD \
&& { echo "$as_me:__oline__: javac -target $target_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
javac -target "$target_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftestfail.class \
&& ! { echo "$as_me:__oline__: javac -target $target_version -source $source_version -d . conftestfail.java" >&AS_MESSAGE_LOG_FD
javac -target "$target_version" -source "$source_version" -d . conftestfail.java >&AS_MESSAGE_LOG_FD 2>&1
}; then
CONF_JAVAC="javac -target $target_version -source $source_version"
HAVE_JAVAC=1
HAVE_JAVACOMP=1
else
CONF_JAVAC="javac -target $target_version"
HAVE_JAVAC=1
HAVE_JAVACOMP=1
fi
else
dnl Maybe this -target option requires a -source option? Try with
dnl -target and -source options. (Supported by Sun javac 1.4 and
dnl higher.)
rm -f conftest.class
if { echo "$as_me:__oline__: javac -target $target_version -source $source_version -d . conftest.java" >&AS_MESSAGE_LOG_FD
javac -target "$target_version" -source "$source_version" -d . conftest.java >&AS_MESSAGE_LOG_FD 2>&1
} \
&& test -f conftest.class \
&& expr `func_classfile_version conftest.class` '<=' $cfversion >/dev/null 2>&AS_MESSAGE_LOG_FD; then
CONF_JAVAC="javac -target $target_version -source $source_version"
HAVE_JAVAC=1
HAVE_JAVACOMP=1
fi
fi
fi
fi
fi
if test -z "$HAVE_JAVACOMP" && test -n "$HAVE_JIKES_IN_PATH"; then
dnl Test whether jikes is usable.
if { jikes >/dev/null 2>/dev/null || test $? = 1; } \
&& (
# See if the existing CLASSPATH is sufficient to make jikes work.
unset JAVA_HOME
jikes conftestlib.java >&AS_MESSAGE_LOG_FD 2>&1
error=$?
rm -f conftestlib.class
exit $error
); then
dnl OK, jikes works.
dnl Now test whether it supports the desired target-version and
dnl source-version.
if test "$source_version" = 1.3; then
CONF_JAVAC="jikes"
HAVE_JIKES=1
HAVE_JAVACOMP=1
fi
fi
fi
fi
rm -f conftest*.java conftest*.class
if test -n "$HAVE_JAVACOMP"; then
ac_result="$CONF_JAVAC"
else
ac_result="no"
fi
AC_MSG_RESULT([$ac_result])
AC_SUBST([CONF_JAVAC])
AC_SUBST([CLASSPATH])
AC_SUBST([CLASSPATH_SEPARATOR])
AC_SUBST([HAVE_JAVAC_ENVVAR])
AC_SUBST([HAVE_GCJ_C])
AC_SUBST([HAVE_JAVAC])
AC_SUBST([HAVE_JIKES])
])
# Simulates gt_JAVACOMP when no Java support is desired.
AC_DEFUN([gt_JAVACOMP_DISABLED],
[
CONF_JAVAC=
HAVE_JAVAC_ENVVAR=
HAVE_GCJ_C=
HAVE_JAVAC=
HAVE_JIKES=
AC_SUBST([CONF_JAVAC])
AC_SUBST([HAVE_JAVAC_ENVVAR])
AC_SUBST([HAVE_GCJ_C])
AC_SUBST([HAVE_JAVAC])
AC_SUBST([HAVE_JIKES])
])
|
