Description:
------------
Hey guys, I just downloaded the latest stable version and tried to compile it on my Ubuntu 17.10 with PHP 7.1 and got this:

In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:56:5: error: redeclaration of enumerator ‘IDNA_SUCCESS’
     IDNA_SUCCESS = 0,
     ^~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:285:5: note: previous definition of ‘IDNA_SUCCESS’ was here
     IDNA_SUCCESS = IDN2_OK,
     ^~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:57:5: error: redeclaration of enumerator ‘IDNA_STRINGPREP_ERROR’
     IDNA_STRINGPREP_ERROR = 1,
     ^~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:286:5: note: previous definition of ‘IDNA_STRINGPREP_ERROR’ was here
     IDNA_STRINGPREP_ERROR = IDN2_ENCODING_ERROR,
     ^~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:58:5: error: redeclaration of enumerator ‘IDNA_PUNYCODE_ERROR’
     IDNA_PUNYCODE_ERROR = 2,
     ^~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:287:5: note: previous definition of ‘IDNA_PUNYCODE_ERROR’ was here
     IDNA_PUNYCODE_ERROR = IDN2_PUNYCODE_BAD_INPUT,
     ^~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:59:5: error: redeclaration of enumerator ‘IDNA_CONTAINS_NON_LDH’
     IDNA_CONTAINS_NON_LDH = 3,
     ^~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:288:5: note: previous definition of ‘IDNA_CONTAINS_NON_LDH’ was here
     IDNA_CONTAINS_NON_LDH = IDN2_ENCODING_ERROR,
     ^~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:61:5: error: redeclaration of enumerator ‘IDNA_CONTAINS_LDH’
     IDNA_CONTAINS_LDH = IDNA_CONTAINS_NON_LDH,
     ^~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:289:5: note: previous definition of ‘IDNA_CONTAINS_LDH’ was here
     IDNA_CONTAINS_LDH = IDNA_CONTAINS_NON_LDH,
     ^~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:62:5: error: redeclaration of enumerator ‘IDNA_CONTAINS_MINUS’
     IDNA_CONTAINS_MINUS = 4,
     ^~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:290:5: note: previous definition of ‘IDNA_CONTAINS_MINUS’ was here
     IDNA_CONTAINS_MINUS = IDN2_ENCODING_ERROR,
     ^~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:63:5: error: redeclaration of enumerator ‘IDNA_INVALID_LENGTH’
     IDNA_INVALID_LENGTH = 5,
     ^~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:291:5: note: previous definition of ‘IDNA_INVALID_LENGTH’ was here
     IDNA_INVALID_LENGTH = IDN2_DISALLOWED,
     ^~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:64:5: error: redeclaration of enumerator ‘IDNA_NO_ACE_PREFIX’
     IDNA_NO_ACE_PREFIX = 6,
     ^~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:292:5: note: previous definition of ‘IDNA_NO_ACE_PREFIX’ was here
     IDNA_NO_ACE_PREFIX = IDN2_ENCODING_ERROR,
     ^~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:65:5: error: redeclaration of enumerator ‘IDNA_ROUNDTRIP_VERIFY_ERROR’
     IDNA_ROUNDTRIP_VERIFY_ERROR = 7,
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:293:5: note: previous definition of ‘IDNA_ROUNDTRIP_VERIFY_ERROR’ was here
     IDNA_ROUNDTRIP_VERIFY_ERROR = IDN2_ENCODING_ERROR,
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:66:5: error: redeclaration of enumerator ‘IDNA_CONTAINS_ACE_PREFIX’
     IDNA_CONTAINS_ACE_PREFIX = 8,
     ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:294:5: note: previous definition of ‘IDNA_CONTAINS_ACE_PREFIX’ was here
     IDNA_CONTAINS_ACE_PREFIX = IDN2_ENCODING_ERROR,
     ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:67:5: error: redeclaration of enumerator ‘IDNA_ICONV_ERROR’
     IDNA_ICONV_ERROR = 9,
     ^~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:295:5: note: previous definition of ‘IDNA_ICONV_ERROR’ was here
     IDNA_ICONV_ERROR = IDN2_ENCODING_ERROR,
     ^~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:69:5: error: redeclaration of enumerator ‘IDNA_MALLOC_ERROR’
     IDNA_MALLOC_ERROR = 201,
     ^~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:296:5: note: previous definition of ‘IDNA_MALLOC_ERROR’ was here
     IDNA_MALLOC_ERROR = IDN2_MALLOC,
     ^~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:70:5: error: redeclaration of enumerator ‘IDNA_DLOPEN_ERROR’
     IDNA_DLOPEN_ERROR = 202
     ^~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:297:5: note: previous definition of ‘IDNA_DLOPEN_ERROR’ was here
     IDNA_DLOPEN_ERROR = IDN2_MALLOC
     ^~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:71:5: error: conflicting types for ‘Idna_rc’
   } Idna_rc;
     ^~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:298:5: note: previous declaration of ‘Idna_rc’ was here
   } Idna_rc;
     ^~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:76:5: error: redeclaration of enumerator ‘IDNA_ALLOW_UNASSIGNED’
     IDNA_ALLOW_UNASSIGNED = 0x0001,
     ^~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:303:5: note: previous definition of ‘IDNA_ALLOW_UNASSIGNED’ was here
     IDNA_ALLOW_UNASSIGNED = IDN2_ALLOW_UNASSIGNED,
     ^~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:77:5: error: redeclaration of enumerator ‘IDNA_USE_STD3_ASCII_RULES’
     IDNA_USE_STD3_ASCII_RULES = 0x0002
     ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:304:5: note: previous definition of ‘IDNA_USE_STD3_ASCII_RULES’ was here
     IDNA_USE_STD3_ASCII_RULES = IDN2_USE_STD3_ASCII_RULES
     ^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:38:0:
/usr/include/idna.h:78:5: error: conflicting types for ‘Idna_flags’
   } Idna_flags;
     ^~~~~~~~~~
In file included from /home/user/Downloads/pecl_http-3.1.0/src/php_http.c:35:0:
/usr/include/idn2.h:305:5: note: previous declaration of ‘Idna_flags’ was here
   } Idna_flags;
     ^~~~~~~~~~
/usr/include/idna.h:84:29: error: conflicting types for ‘idn2_strerror’
   extern IDNAPI const char *idna_strerror (Idna_rc rc);
                             ^
/usr/include/idn2.h:269:5: note: previous declaration of ‘idn2_strerror’ was here
     idn2_strerror (int rc) G_GNUC_IDN2_ATTRIBUTE_CONST;
     ^~~~~~~~~~~~~
/usr/include/idna.h:87:21: error: expected ‘;’, ‘,’ or ‘)’ before ‘|’ token
   extern IDNAPI int idna_to_ascii_4i (const uint32_t * in, size_t inlen,
                     ^
/usr/include/idna.h:95:21: error: expected ‘;’, ‘,’ or ‘)’ before ‘|’ token
   extern IDNAPI int idna_to_ascii_4z (const uint32_t * input,
                     ^
/usr/include/idna.h:98:21: error: expected ‘;’, ‘,’ or ‘)’ before ‘|’ token
   extern IDNAPI int idna_to_ascii_8z (const char *input, char **output,
                     ^
/usr/include/idna.h:101:21: error: expected ‘;’, ‘,’ or ‘)’ before ‘|’ token
   extern IDNAPI int idna_to_ascii_lz (const char *input, char **output,
                     ^
Makefile:214: recipe for target 'src/php_http.lo' failed
make: *** [src/php_http.lo] Error 1

Expected result:
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Compile

Actual result:
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Errors