Hi, this mail is from Jeff .I need your professional help. The below is my problem—— In the stage of installation, i received some mistake notice at my first time using erlang just as followings: ... fi gcc -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/local/freetype/include/freetype2 -I/usr/local/freetype/include -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wnested-externs -fno-strict-aliasing -DFONTCONFIG_PATH=\"/usr/etc/fonts\" -I.. -I../src -g -O2 -MT fcfreetype.lo -MD -MP -MF .deps/fcfreetype.Tpo -c fcfreetype.c -fPIC -DPIC -o .libs/fcfreetype.o fcfreetype.c:53:10: error: #include expects "FILENAME" or <FILENAME> fcfreetype.c:58:10: error: #include expects "FILENAME" or <FILENAME> fcfreetype.c:59:10: error: #include expects "FILENAME" or <FILENAME> fcfreetype.c:60:10: error: #include expects "FILENAME" or <FILENAME> fcfreetype.c: In function 'FcSfntNameTranscode': fcfreetype.c:736: warning: pointer targets in passing argument 2 of 'FcStrCmpIgnoreBlanksAndCase' differ in signedness fcfreetype.c: In function 'FcSfntNameLanguage': fcfreetype.c:752: warning: pointer targets in return differ in signedness fcfreetype.c: In function 'FcVendorMatch': fcfreetype.c:804: warning: pointer targets in passing argument 1 of 'strlen' differ in signedness fcfreetype.c: At top level: fcfreetype.c:899: warning: pointer targets in initialization differ in signedness fcfreetype.c:900: warning: pointer targets in initialization differ in signedness fcfreetype.c:901: warning: pointer targets in initialization differ in signedness fcfreetype.c:902: warning: pointer targets in initialization differ in signedness fcfreetype.c:903: warning: pointer targets in initialization differ in signedness fcfreetype.c:904: warning: pointer targets in initialization differ in signedness fcfreetype.c:905: warning: pointer targets in initialization differ in signedness fcfreetype.c:906: warning: pointer targets in initialization differ in signedness fcfreetype.c:907: warning: pointer targets in initialization differ in signedness fcfreetype.c:908: warning: pointer targets in initialization differ in signedness fcfreetype.c:909: warning: pointer targets in initialization differ in signedness fcfreetype.c:910: warning: pointer targets in initialization differ in signedness fcfreetype.c:911: warning: pointer targets in initialization differ in signedness fcfreetype.c:912: warning: pointer targets in initialization differ in signedness fcfreetype.c:913: warning: pointer targets in initialization differ in signedness fcfreetype.c:914: warning: pointer targets in initialization differ in signedness fcfreetype.c:923: warning: pointer targets in initialization differ in signedness fcfreetype.c:924: warning: pointer targets in initialization differ in signedness fcfreetype.c:925: warning: pointer targets in initialization differ in signedness fcfreetype.c:926: warning: pointer targets in initialization differ in signedness fcfreetype.c:927: warning: pointer targets in initialization differ in signedness fcfreetype.c:928: warning: pointer targets in initialization differ in signedness fcfreetype.c:929: warning: pointer targets in initialization differ in signedness fcfreetype.c:930: warning: pointer targets in initialization differ in signedness fcfreetype.c:931: warning: pointer targets in initialization differ in signedness fcfreetype.c:940: warning: pointer targets in initialization differ in signedness fcfreetype.c:941: warning: pointer targets in initialization differ in signedness fcfreetype.c: In function 'FcGetPixelSize': fcfreetype.c:958: error: dereferencing pointer to incomplete type fcfreetype.c: In function 'FcFreeTypeQuery': fcfreetype.c:1157: warning: pointer targets in passing argument 3 of 'FcPatternAddString' differ in signedness fcfreetype.c:1172: warning: pointer targets in passing argument 1 of 'FcStrCmpIgnoreBlanksAndCase' differ in signedness fcfreetype.c:1172: warning: pointer targets in passing argument 2 of 'FcStrCmpIgnoreBlanksAndCase' differ in signedness fcfreetype.c:1176: warning: pointer targets in passing argument 3 of 'FcPatternAddString' differ in signedness fcfreetype.c:1182: warning: pointer targets in passing argument 1 of 'FcStrCmpIgnoreBlanksAndCase' differ in signedness fcfreetype.c:1182: warning: pointer targets in passing argument 2 of 'FcStrCmpIgnoreBlanksAndCase' differ in signedness fcfreetype.c:1186: warning: pointer targets in passing argument 3 of 'FcPatternAddString' differ in signedness fcfreetype.c:1403: warning: pointer targets in passing argument 1 of 'FcStringIsConst' differ in signedness fcfreetype.c:1435: error: dereferencing pointer to incomplete type fcfreetype.c:1437: warning: pointer targets in assignment differ in signedness fcfreetype.c:1442: error: dereferencing pointer to incomplete type fcfreetype.c:1465: error: dereferencing pointer to incomplete type fcfreetype.c:1468: warning: pointer targets in passing argument 1 of 'FcStringIsConst' differ in signedness fcfreetype.c:1521: warning: pointer targets in assignment differ in signedness fcfreetype.c:1545: error: dereferencing pointer to incomplete type fcfreetype.c:1562: warning: implicit declaration of function 'FT_MODULE_CLASS' fcfreetype.c:1562: warning: nested extern declaration of 'FT_MODULE_CLASS' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1562: error: dereferencing pointer to incomplete type fcfreetype.c:1562: error: invalid type argument of '->' fcfreetype.c:1599: error: dereferencing pointer to incomplete type fcfreetype.c:1609: error: dereferencing pointer to incomplete type fcfreetype.c:1632: warning: pointer targets in passing argument 3 of 'FcPatternAddString' differ in signedness fcfreetype.c: In function 'addtag': fcfreetype.c:2692: warning: pointer targets in passing argument 1 of 'strcat' differ in signedness fcfreetype.c:2693: warning: pointer targets in passing argument 1 of 'strcat' differ in signedness fcfreetype.c:2694: warning: pointer targets in passing argument 1 of 'strcat' differ in signedness fcfreetype.c:2694: warning: pointer targets in passing argument 2 of 'strcat' differ in signedness fcfreetype.c: In function 'GetScriptTags': fcfreetype.c:2710: error: 'TT_Face' undeclared (first use in this function) fcfreetype.c:2710: error: (Each undeclared identifier is reported only once fcfreetype.c:2710: error: for each function it appears in.) fcfreetype.c:2710: error: expected ';' before 'tt_face' fcfreetype.c:2719: error: 'tt_face' undeclared (first use in this function) fcfreetype.c:2722: warning: implicit declaration of function 'FT_STREAM_POS' fcfreetype.c:2722: warning: nested extern declaration of 'FT_STREAM_POS' fcfreetype.c:2726: warning: implicit declaration of function 'FT_STREAM_SEEK' fcfreetype.c:2726: warning: nested extern declaration of 'FT_STREAM_SEEK' fcfreetype.c:2726: warning: implicit declaration of function 'FT_FRAME_ENTER' fcfreetype.c:2726: warning: nested extern declaration of 'FT_FRAME_ENTER' fcfreetype.c:2729: warning: implicit declaration of function 'FT_GET_USHORT' fcfreetype.c:2729: warning: nested extern declaration of 'FT_GET_USHORT' fcfreetype.c:2731: warning: implicit declaration of function 'FT_FRAME_EXIT' fcfreetype.c:2731: warning: nested extern declaration of 'FT_FRAME_EXIT' fcfreetype.c:2747: warning: implicit declaration of function 'FT_SET_ERROR' fcfreetype.c:2747: warning: nested extern declaration of 'FT_SET_ERROR' fcfreetype.c:2747: warning: implicit declaration of function 'FT_MEM_ALLOC_ARRAY' fcfreetype.c:2747: warning: nested extern declaration of 'FT_MEM_ALLOC_ARRAY' fcfreetype.c:2747: error: expected expression before 'FT_ULong' fcfreetype.c:2756: warning: implicit declaration of function 'FT_GET_ULONG' fcfreetype.c:2756: warning: nested extern declaration of 'FT_GET_ULONG' fcfreetype.c:2787: warning: implicit declaration of function 'FT_FREE' fcfreetype.c:2787: warning: nested extern declaration of 'FT_FREE' fcfreetype.c:2714: warning: unused variable 'memory' fcfreetype.c: In function 'FcFontCapabilities': fcfreetype.c:2823: warning: pointer targets in passing argument 1 of 'strcpy' differ in signedness fcfreetype.c:2800: warning: unused variable 'memory' make[1]: *** [fcfreetype.lo] Error 1 make[1]: Leaving directory `/root/software/fontconfig-2.3.2/src' make: *** [install-recursive] Error 1 Those errors showed after i run the 'make' command. My last command is: ./configure --prefix=/usr --with-freetype-config=/usr/local/freetype/bin/freetype-config This command ran well! Another point i want to say is that the version of my freetype is 2.4.8. Could you please help me analyze what's wrong and what should i do to solve those error? Thank you! Bset Regards! Jeff