<html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body text="#000099" bgcolor="#FFFFFF"> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <span style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none; background-color: rgb(250, 250, 250);">I am finding something <u style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(250, 250, 250);">very<span style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none; background-color: rgb(250, 250, 250);"> strange with the with the Mesa 10.6.3 GLSL linker.<br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(250, 250, 250);"> <br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(250, 250, 250);"> <span style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none; background-color: rgb(250, 250, 250);">Compiling my GLSL code takes 63 ms but linking it takes a <b style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(250, 250, 250);">massive<span style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none; background-color: rgb(250, 250, 250);"> 90,000 ms ! Yes, that's a minute and a half. The shader code then works just fine, but what the hell is the Mesa linker doing? I gather that the linking stage is more complex than traditional C code linking because certain error messages, that one might expect from the compiler, are emitted by the linker.<br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(250, 250, 250);"> <br style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(250, 250, 250);"> <span style="color: rgb(51, 51, 51); font-family: Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none; background-color: rgb(250, 250, 250);">On another platform, using the same program and the same GLSL code, but the Nvidia 346.47 driver, compiling takes 30 ms and linking takes 12 ms. I'm most grateful that there is a Mesa compiler otherwise I wouldn't be able to use a Haswell processor with Linux. But this is an anomaly. Clive. </body> </html>