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configure: detect ICU via icu-uc/icu-i18n pkg-config modules to easily build on Debian #597

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configure: detect ICU via icu-uc/icu-i18n pkg-config modules to easily build on Debian #597

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10 changes: 9 additions & 1 deletion configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -336,12 +336,16 @@ fi

dnl
dnl Check for ICU
dnl Prefer icu-config for legacy distros; fall back to pkg-config icu-uc/icu-i18n
dnl (icu-config was removed in ICU 63+ and is absent on modern Debian/Ubuntu).
dnl
ICU_MODULE_CFLAGS="`icu-config --cppflags 2> /dev/null`";
ICU_MODULE_LIBS="`icu-config --ldflags 2> /dev/null`";
if test -z "$ICU_MODULE_LIBS"
then
PKG_CHECK_MODULES([ICU_MODULE], [icu >= 0.21])
PKG_CHECK_MODULES([ICU_MODULE], [icu-uc >= 0.21 icu-i18n >= 0.21],
[],
[PKG_CHECK_MODULES([ICU_MODULE], [icu >= 0.21])])
fi

AC_MSG_CHECKING([use latest ICU])
Expand All @@ -356,6 +360,10 @@ if test "x${icu_6x}" = "xyes"
then
AC_MSG_CHECKING(for ICU version)
ICU_MODULE_VERSION="`icu-config --version 2> /dev/null`";
if test -z "$ICU_MODULE_VERSION"
then
ICU_MODULE_VERSION="`$PKG_CONFIG --modversion icu-uc 2> /dev/null`";
fi
if test "${ICU_MODULE_VERSION%%.*}" -ge "60"
then
AM_EXTRA_CPPFLAGS="${AM_EXTRA_CPPFLAGS} -D ICU6x"
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