#!/bin/bash

#

mkl_meta_set "description" "name"      "librdkafka"

mkl_meta_set "description" "oneline"   "The Apache Kafka C/C++ library"

mkl_meta_set "description" "long"      "Full Apache Kafka protocol support, including producer and consumer"

mkl_meta_set "description" "copyright" "Copyright (c) 2012-2015 Magnus Edenhill"

# Enable generation of pkg-config .pc file

mkl_mkvar_set "" GEN_PKG_CONFIG y

mkl_require cxx

mkl_require lib

mkl_require pic

mkl_require atomics

mkl_require good_cflags

mkl_require socket

# Generate version variables from rdkafka.h hex version define

# so we can use it as string version when generating a pkg-config file.

verdef=$(grep '^#define  *RD_KAFKA_VERSION  *0x' src/rdkafka.h | sed 's/^#define  *RD_KAFKA_VERSION  *\(0x[a-f0-9]*\)\.*$/\1/')

mkl_require parseversion hex2str "%d.%d.%d" "$verdef" RDKAFKA_VERSION_STR

mkl_toggle_option "Development" ENABLE_DEVEL "--enable-devel" "Enable development asserts, checks, etc" "n"

mkl_toggle_option "Development" ENABLE_VALGRIND "--enable-valgrind" "Enable in-code valgrind suppressions" "n"

mkl_toggle_option "Development" ENABLE_REFCNT_DEBUG "--enable-refcnt-debug" "Enable refcnt debugging" "n"

mkl_toggle_option "Development" ENABLE_SHAREDPTR_DEBUG "--enable-sharedptr-debug" "Enable sharedptr debugging" "n"

mkl_toggle_option "Feature" ENABLE_LZ4_EXT "--enable-lz4" "Enable external LZ4 library support" "y"

mkl_toggle_option "Feature" ENABLE_SSL "--enable-ssl" "Enable SSL support" "y"

mkl_toggle_option "Feature" ENABLE_SASL "--enable-sasl" "Enable SASL support with Cyrus libsasl2" "y"

function checks {

    # -lrt is needed on linux for clock_gettime: link it if it exists.

    mkl_lib_check "librt" "" cont CC "-lrt"

    # required libs

    mkl_lib_check "libpthread" "" fail CC "-lpthread" \

                  "#include <pthread.h>"

    # Check if dlopen() is available

    mkl_lib_check "libdl" "WITH_LIBDL" disable CC "-ldl" \

"

#include <stdlib.h>

#include <dlfcn.h>

void foo (void) {

   void *h = dlopen(\"__bad_lib\", 0);

   void *p = dlsym(h, \"sym\");

   if (p)

     p = NULL;

   dlclose(h);

}"

    if [[ $WITH_LIBDL == "y" ]]; then

        mkl_allvar_set WITH_PLUGINS WITH_PLUGINS y

    fi

    # optional libs

    mkl_lib_check "zlib" "WITH_ZLIB" disable CC "-lz" \

                  "#include <zlib.h>"

    mkl_lib_check "libcrypto" "" disable CC "-lcrypto"

    if [[ "$ENABLE_LZ4_EXT" == "y" ]]; then

        mkl_lib_check --static=-llz4 "liblz4" "WITH_LZ4_EXT" disable CC "-llz4" \

                      "#include <lz4frame.h>"

    fi

    # Snappy support is built-in

    mkl_allvar_set WITH_SNAPPY WITH_SNAPPY y

    # Enable sockem (tests)

    mkl_allvar_set WITH_SOCKEM WITH_SOCKEM y

    if [[ "$ENABLE_SSL" == "y" ]]; then

	mkl_meta_set "libssl" "deb" "libssl-dev"

        if [[ $MKL_DISTRO == "osx" ]]; then

            # Add brew's OpenSSL pkg-config path on OSX

            export PKG_CONFIG_PATH="$PKG_CONFIG_PATH:/usr/local/opt/openssl/lib/pkgconfig"

        fi

	mkl_lib_check "libssl" "WITH_SSL" disable CC "-lssl" \

                      "#include <openssl/ssl.h>"

    fi

    if [[ "$ENABLE_SASL" == "y" ]]; then

        mkl_meta_set "libsasl2" "deb" "libsasl2-dev"

        if ! mkl_lib_check "libsasl2" "WITH_SASL_CYRUS" disable CC "-lsasl2" "#include <sasl/sasl.h>" ; then

	    mkl_lib_check "libsasl" "WITH_SASL_CYRUS" disable CC "-lsasl" \

                          "#include <sasl/sasl.h>"

        fi

    fi

    if [[ "$WITH_SSL" == "y" ]]; then

        # SASL SCRAM requires base64 encoding from OpenSSL

        mkl_allvar_set WITH_SASL_SCRAM WITH_SASL_SCRAM y

    fi

    # CRC32C: check for crc32 instruction support.

    #         This is also checked during runtime using cpuid.

    mkl_compile_check crc32chw WITH_CRC32C_HW disable CC "" \

                      "

#include <inttypes.h>

#include <stdio.h>

#define LONGx1 \"8192\"

#define LONGx2 \"16384\"

void foo (void) {

   const char *n = \"abcdefghijklmnopqrstuvwxyz0123456789\";

   uint64_t c0 = 0, c1 = 1, c2 = 2;

   uint64_t s;

   uint32_t eax = 1, ecx;

   __asm__(\"cpuid\"

           : \"=c\"(ecx)

           : \"a\"(eax)

           : \"%ebx\", \"%edx\");

   __asm__(\"crc32b\t\" \"(%1), %0\"

           : \"=r\"(c0)

           : \"r\"(n), \"0\"(c0));

   __asm__(\"crc32q\t\" \"(%3), %0\n\t\"

           \"crc32q\t\" LONGx1 \"(%3), %1\n\t\"

           \"crc32q\t\" LONGx2 \"(%3), %2\"

           : \"=r\"(c0), \"=r\"(c1), \"=r\"(c2)

           : \"r\"(n), \"0\"(c0), \"1\"(c1), \"2\"(c2));

  s = c0 + c1 + c2;

  printf(\"avoiding unused code removal by printing %d, %d, %d\n\", (int)s, (int)eax, (int)ecx);

}

"

    # Check for libc regex

    mkl_compile_check "regex" "HAVE_REGEX" disable CC "" \

"

#include <stddef.h>

#include <regex.h>

void foo (void) {

   regcomp(NULL, NULL, 0);

   regexec(NULL, NULL, 0, NULL, 0);

   regerror(0, NULL, NULL, 0);

   regfree(NULL);

}"

    # Older g++ (<=4.1?) gives invalid warnings for the C++ code.

    mkl_mkvar_append CXXFLAGS CXXFLAGS "-Wno-non-virtual-dtor"

    # Required on SunOS

    if [[ $MKL_DISTRO == "SunOS" ]]; then

	mkl_mkvar_append CPPFLAGS CPPFLAGS "-D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -D__EXTENSIONS__"

	# Source defines _POSIX_C_SOURCE to 200809L for Solaris, and this is

	# incompatible on that platform with compilers < c99.

	mkl_mkvar_append CFLAGS CFLAGS "-std=c99"

    fi

    # Check if strndup() is available (isn't on Solaris 10)

    mkl_compile_check "strndup" "HAVE_STRNDUP" disable CC "" \

"#include <string.h>

int foo (void) {

   return strndup(\"hi\", 2) ? 0 : 1;

}"

    # Check if strerror_r() is available.

    # The check for GNU vs XSI is done in rdposix.h since

    # we can't rely on all defines to be set here (_GNU_SOURCE).

    mkl_compile_check "strerror_r" "HAVE_STRERROR_R" disable CC "" \

"#include <string.h>

const char *foo (void) {

   static char buf[64];

   strerror_r(1, buf, sizeof(buf));

   return buf;

}"

    # See if GNU's pthread_setname_np() is available, and in what form.

    mkl_compile_check "pthread_setname_gnu" "HAVE_PTHREAD_SETNAME_GNU" disable CC "-D_GNU_SOURCE -lpthread" \

'

#include <pthread.h>

void foo (void) {

  pthread_setname_np(pthread_self(), "abc");

}

'

    # Figure out what tool to use for dumping public symbols.

    # We rely on configure.cc setting up $NM if it exists.

    if mkl_env_check "nm" "" cont "NM" ; then

	# nm by future mk var

	if [[ $MKL_DISTRO == "osx" || $MKL_DISTRO == "AIX" ]]; then

	    mkl_mkvar_set SYMDUMPER SYMDUMPER '$(NM) -g'

	else

	    mkl_mkvar_set SYMDUMPER SYMDUMPER '$(NM) -D'

	fi

    else

	# Fake symdumper

	mkl_mkvar_set SYMDUMPER SYMDUMPER 'echo'

    fi

    # The linker-script generator (lds-gen.py) requires python

    if [[ $WITH_LDS == y ]]; then

        if ! mkl_command_check python "HAVE_PYTHON" "disable" "python3 -V"; then

            mkl_err "disabling linker-script since python is not available"

            mkl_mkvar_set WITH_LDS WITH_LDS "n"

        fi

    fi

    if [[ "$ENABLE_VALGRIND" == "y" ]]; then

	mkl_compile_check valgrind WITH_VALGRIND disable CC "" \

			  "#include <valgrind/memcheck.h>"

    fi

}