Re: [gentoo-user] dev-lang/php-7.4.21-r1::gentoo failed (compile phase)

[Michael Orlitzky]

On Sat, 2021-07-17 at 15:13 -0600, thelma@×××××××××××.com wrote:
> On of my system is giving me an error when compiling php
>
> In file included from /usr/include/libxml2/libxml/parser.h:812,
>                  from /var/tmp/portage/dev-lang/php-7.4.21-r1/work/sapis-build/cli/ext/libxml/libxml.c:34:
> /usr/include/libxml2/libxml/encoding.h:31:10: fatal error: unicode/ucnv.h: No such file or directory
>    31 | #include <unicode/ucnv.h>
>       |          ^~~~~~~~~~~~~~~~
>

Was your dev-libs/libxml2 built with USE=icu? And is icu installed? If
you look in /usr/include/libxml2/libxml/encoding.h you probably see,

  #ifdef LIBXML_ICU_ENABLED
  #include <unicode/ucnv.h>
  #endif

so that unicode header should only be used when libxml2 was built with
USE=icu. In that case, USE=icu also pulls in dev-libs/icu, which is
what provides the header.