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@@ -29,9 +29,11 @@ else
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   $stderr.puts "Trying to detect MySQL configuration with mysql_config..."
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   if (cflags = `mysql_config --cflags`.strip) && $? == 0 &&
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      (libs   = `mysql_config --libs`.strip)   && $? == 0
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+    $stderr.puts "Succeeded to detect MySQL configuration with mysql_config."
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     $CPPFLAGS += ' ' + cflags.strip
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     $libs = libs.strip + " " + $libs
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   else
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+    $stderr.puts "Failed to detect MySQL configuration with mysql_config."
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     $stderr.puts "Trying to detect MySQL client library..."
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     inc, lib = dir_config('mysql', '/usr/local')
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     libs = ['m', 'z', 'socket', 'nsl', 'mygcc']
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@@ -45,6 +47,11 @@ end
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 have_func('mysql_ssl_set')
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 have_func('rb_str_set_len')
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+
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+## define HAVE_MYSQL_H if mysql.h is found
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+have_header('mysql.h') or have_header('mysql/mysql.h') or die "can't find 'mysql.h'."
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+
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+
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 #if have_header('mysql.h') then
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 #  src = "#include <errmsg.h>\n#include <mysqld_error.h>\n"
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 #elsif have_header('mysql/mysql.h') then
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@@ -52,7 +59,7 @@ have_func('rb_str_set_len')
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 #else
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 #  die "can't find 'mysql.h'."
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 #end
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-#
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+
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 ## make mysql constant
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 #File.open("conftest.c", "w") do |f|
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 #  f.puts src