I can't run X from my Slackware packages so I tried to build my own.  I downloaded the source for all the components.  I built every package (sometimes not getting them in the right order and having to figure that out - instructions for the right order would be nice) but when I try to build xorg-server I get the errors below.

All the GLX source is in xorg-server; how can it be wrong?  I find it a curious coincidence that the package xorg-server halts right after loading driswrast.

  CC     glxdriswrast.o
In file included from glxdriswrast.c:49:
glxdricommon.h:32: error: expected ':', ',', ';', '}' or '__attribute__' before '*' token
glxdricommon.h:36: warning: type defaults to 'int' in declaration of '__DRIcoreExtension'
glxdricommon.h:36: error: expected ';', ',' or ')' before '*' token
glxdricommon.h:38: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'systemTimeExtension'
glxdriswrast.c:74: error: expected ':', ',', ';', '}' or '__attribute__' before '*' token
glxdriswrast.c: In function '__glXDRIdrawableDestroy':
glxdriswrast.c:98: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c:98: error: 'core' undeclared (first use in this function)
glxdriswrast.c:98: error: (Each undeclared identifier is reported only once
glxdriswrast.c:98: error: for each function it appears in.)
glxdriswrast.c:98: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIdrawableSwapBuffers':
glxdriswrast.c:114: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c:114: error: 'core' undeclared (first use in this function)
glxdriswrast.c:114: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIdrawableCopySubBuffer':
glxdriswrast.c:126: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c:126: error: 'copySubBuffer' undeclared (first use in this function)
glxdriswrast.c:127: error: '__GLXDRIscreen' has no member named 'copySubBuffer'
glxdriswrast.c: In function '__glXDRIcontextDestroy':
glxdriswrast.c:139: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIcontextMakeCurrent':
glxdriswrast.c:152: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIcontextLoseCurrent':
glxdriswrast.c:163: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIcontextCopy':
glxdriswrast.c:174: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIcontextForceCurrent':
glxdriswrast.c:186: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIscreenDestroy':
glxdriswrast.c:251: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIscreenCreateContext':
glxdriswrast.c:268: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c:268: error: 'core' undeclared (first use in this function)
glxdriswrast.c:268: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c:269: warning: ISO C90 forbids mixed declarations and code
glxdriswrast.c:290: error: '__GLXDRIconfig' has no member named 'driConfig'
glxdriswrast.c: In function '__glXDRIscreenCreateDrawable':
glxdriswrast.c:339: error: '__GLXDRIscreen' has no member named 'swrast'
glxdriswrast.c:340: error: '__GLXDRIconfig' has no member named 'driConfig'
glxdriswrast.c: In function 'swrastPutImage':
glxdriswrast.c:370: error: '__DRI_SWRAST_IMAGE_OP_DRAW' undeclared (first use in this function)
glxdriswrast.c:373: error: '__DRI_SWRAST_IMAGE_OP_SWAP' undeclared (first use in this function)
glxdriswrast.c: At top level:
glxdriswrast.c:398: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'swrastLoaderExtension'
glxdriswrast.c:405: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c: In function 'initializeExtensions':
glxdriswrast.c:414: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c:414: error: 'extensions' undeclared (first use in this function)
glxdriswrast.c:415: warning: ISO C90 forbids mixed declarations and code
glxdriswrast.c:417: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c: In function '__glXDRIscreenProbe':
glxdriswrast.c:447: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c:447: error: 'extensions' undeclared (first use in this function)
glxdriswrast.c:448: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token
glxdriswrast.c:448: warning: ISO C90 forbids mixed declarations and code
glxdriswrast.c:448: error: 'driConfigs' undeclared (first use in this function)
glxdriswrast.c:449: warning: ISO C90 forbids mixed declarations and code
glxdriswrast.c:471: error: '__DRI_DRIVER_EXTENSIONS' undeclared (first use in this function)
glxdriswrast.c:479: error: '__DRI_CORE' undeclared (first use in this function)
glxdriswrast.c:479: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:479: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:479: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:479: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:480: error: '__DRI_CORE_VERSION' undeclared (first use in this function)
glxdriswrast.c:481: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c:481: error: expected ')' before '__DRIcoreExtension'
glxdriswrast.c:481: warning: type defaults to 'int' in declaration of 'type name'
glxdriswrast.c:483: error: '__DRI_SWRAST' undeclared (first use in this function)
glxdriswrast.c:483: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:483: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:483: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:483: warning: left-hand operand of comma expression has no effect
glxdriswrast.c:484: error: '__DRI_SWRAST_VERSION' undeclared (first use in this function)
glxdriswrast.c:485: error: '__GLXDRIscreen' has no member named 'swrast'
glxdriswrast.c:485: error: expected ')' before '__DRIswrastExtension'
glxdriswrast.c:485: warning: type defaults to 'int' in declaration of 'type name'
glxdriswrast.c:489: error: '__GLXDRIscreen' has no member named 'core'
glxdriswrast.c:489: error: '__GLXDRIscreen' has no member named 'swrast'
glxdriswrast.c:496: error: '__GLXDRIscreen' has no member named 'swrast'
glxdriswrast.c:497: error: 'loader_extensions' undeclared (first use in this function)
glxdriswrast.c:509: warning: implicit declaration of function 'glxConvertConfigs'
glxdriswrast.c:509: warning: nested extern declaration of 'glxConvertConfigs'
glxdriswrast.c:509: error: '__GLXDRIscreen' has no member named 'core'
make[1]: *** [glxdriswrast.lo] Error 1
make: *** [all-recursive] Error 1