Pidgin compile error #2

(hg --cwd . id -i --debug) 2>/dev/null >package_revision_raw.txt \
        || rm -f package_revision_raw.txt
if [ -f package_revision_raw.txt ]; then \
                sed 's/^\(.\{1,\}\)$/#define REVISION "\1"/' package_revision_raw.txt > package_revision.h; \
        fi
[ -f package_revision.h ] || echo "#define REVISION \"unknown\"" > package_revision.h
make -C ./libpurple -f Makefile.mingw
make[1]: Entering directory `/home/garibaldi/pidgin/2.10.12/pidgin-2.10.12.1/libpurple'
/usr/bin/i586-mingw32msvc-cc -O2 -Wall -Waggregate-return -Wcast-align -Wdeclaration-after-statement -Werror-implicit-function-declaration -Wextra -Wno-sign-compare -Wno-unused-parameter -Winit-self -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wundef -Wstack-protector -fwrapv -fno-strict-overflow -Wno-missing-field-initializers -Wformat-security -fstack-protector-all --param ssp-buffer-size=1 -pipe -mms-bitfields -g -DHAVE_CYRUS_SASL -DHAVE_CONFIG_H -DWIN32_LEAN_AND_MEAN -I../../win32-dev/w32api/include -I../../win32-dev/libxml2-2.9.0/include -I../libpurple -I../libpurple/win32 -I.. -I../../win32-dev/gtk_2_0-2.14/include -I../../win32-dev/gtk_2_0-2.14/include/glib-2.0 -I../../win32-dev/gtk_2_0-2.14/lib/glib-2.0/include -I../../win32-dev/libxml2-2.9.2_daa1/include/libxml2 -o account.o -c account.c
In file included from account.c:26:
internal.h:109:21: error: dlfcn.h: No such file or directory
account.c: In function ‘request_password_ok_cb’:
account.c:1167: warning: unused variable ‘remember’
make[1]: *** [account.o] Error 1