"I don't worry about breaking records, it something that happens naturally, with lots of dedication," the 29-year-old told RTP television.
Cameroon were level at half-time but fell apart in the second half as they conceded four goals in a disastrous 18-minute spell.
Portugal went ahead in the 21st minute when Joao Pereira pulled the ball back from near the byline and found Ronaldo, who shimmied past his marker and fired a low shot past Guy Rolland Ndy Assembe to set a new scoring record.
The hosts did not have it all their own way and Vincent Abubakar levelled two minutes before the break when he was given time to control the ball on his chest and score with a shot on the turn.
The second half began with both teams on the attack and Assembe made an outstanding save to deny Ronaldo from close range just after the hour.
But Cameroon collapsed after a dreadful mistake by Aurelien Chedjou, who sent an attempted pass out of defence straight to Raul Meireles and the midfielder gratefully accepted the gift to put Portugal back in front in the 65th minute.
Fabio Coentrao added another two minutes later after he was set up by Silvestre Varela and, with Cameroon wide open, Edinho snapped up the fourth in the 77th minute after Essembe could only touch Ronaldo's shot straight into his path.
Ronaldo completed the scoring in the 83rd minute, firing in a snap shot from 15 metres after two Cameroon defenders failed to clear the ball.
"We are not going to get euphoric because of a 5-1 win," said Portugal coach Paulo Bento.
Hosts Belgium could have scored a number of times before halftime but were left to rue some poor finishing and a scoreline that barely reflected the balance of power in the match.
A Marouane Fellaini header from a corner in the first half and a tight-angled shot from little-used midfielder Radja Nainggolan early in the second ensured what looked like a comfortable two-goal cushion.
However, Didier Drogba muscled past Belgium's defence to pull one back for the visitors with less than 20 minutes to play and a minute into injury time, Gradel slammed in a poor clearance to bring Ivory Coast level.
Ivory Coast remain unbeaten since a mid-August friendly against Mexico, while Belgium, who lost November friendlies to Colombia and Japan, appear in need of some shooting practice.
Switzerland, who went through their qualifying group unbeaten, created plenty of openings and went ahead in the 34th minute after Danijel Pranjic lost possession in midfield.
Drmic collected the ball and wriggled past his marker before beating Danijel Subasic with a low shot into the far corner.
Olic levelled five minutes later when he was left unmarked at a corner and turned the ball in from five metres.
Switzerland regained the lead two minutes after that when Steve von Bergen sent a long punt out of defence and Drmic raced clear of the Croatian rearguard to plant the ball past Subasic from a difficult angle.
Croatia, who had started with Mario Mandzukic on the bench, brought on the Bayern Munich forward at halftime and quickly equalised as the ball was played inside Swiss fullback Stephan Lichtsteiner and Olic got in front of him, then turned his shot wide of Diego Benaglio to score.
Alvaro Pereira scrambled a second-half goal to give World Cup finalists Uruguay a scrappy 1-1 draw away to Austria.
Marc Janko scored early on before substitute Pereira replied to deny Austria their first win against South American opposition since they beat Chile at the 1982 World Cup.
Luis Suarez hit the Austria crossbar with a stunning 30-metre free kick in the first half in the only moment of real inspiration from the South Americans.
Romania held Argentina to a 0-0 draw in a lively friendly at the National Arena that featured a host of missed chances and good displays from the goalkeepers in Bucharest.
The visitors dominated the early stages with captain Lionel Messi delivering a corner that was headed just over the bar by defender Federico Fernandez and Gonzalo Higuain going close following a neat passing move.
Romania, dominated by players from league leaders Steaua Bucharest, forced a fingertip save from Sergio Romero to deny home captain Ciprian Marica.
Six minutes before the interval Sergio Aguero almost broke the deadlock after a fine solo run but keeper Ciprian Tatarusanu pulled off an outstanding stop.
Argentina started the second half brightly and Florin Gardos had to make a goalline clearance after Aguero had rounded Manchester City team mate Costel Pantilimon who replaced Tatarusanu in goal at halftime.
Romania, roared on by their passionate fans and defending in numbers, escaped again when substitute Rodrigo Palacio fired wide from five metres and Pantilimon made a brilliant save to deny Ezequiel Lavezzi.
Casting aside trouble at home, Ukraine comfortably beat the United States 2-0 in a friendly held in Cyprus against the backdrop of turmoil at home and tensions with Russia.
Andriy Yarmolenko opened the scoring after 12 minutes when Yevhen Konoplyanka drifted a beautiful ball over the defence for Denys Harmash to beat the offside trap.
U.S. keeper Tim Howard saved the one-on-one but the rebound came back to Harmash who calmly squared it to Yarmolenko who had the simple task of slotting it into the open goal.
Ukraine's pressing was effective and the U.S. struggled to get near Andriy Pyatov's goal with Clint Dempsey's blocked shot being the closest Juergen Klinsmann's men came in the first 20 minutes.
Second-half substitute Marko Devic made a quick impact, doubling Ukraine's lead at the second attempt after Howard had saved the Rubin Kazan forward's first effort when put through on goal.
Bosnia coach Safet Susic (pictured below) suffered a bad start to his World Cup build-up after second-half goals by Gedo and Mohamed Salah gave Egypt a 2-0 win in a fast-paced friendly.
The Bosnians, in World Cup Group F alongside Argentina, Nigeria and Iran, were outplayed by crisp one-touch passing from the Egyptians with Chelsea winger Salah tormenting his markers all evening.
Roared on by 10,000 fans in Innsbruck, the Bosnians could only muster two half-chances in the opening period after Ahmed Fathi had volleyed just wide of the far post at the other end.
Wing-back Senad Lulic fired over the bar for Bosnia in the 30th minute before striker Vedad Ibisevic had a shot blocked by a defender.
The African side took the lead shortly after the interval as Gedo raced clear of his markers and steered a low shot past advancing keeper Asmir Begovic into the far corner.
And a small band of Egyptian fans in the Tivoli stadium were in raptures shortly after the hour when Salah sprung the offside trap and capped a triangular passing blitz with a calm finish
World Cup-bound Algeria claimed a rare victory over European opposition when they beat visiting Slovenia 2-0 in Blida.
Hilal El Arbi Soudani and Saphir Sliti Taider scored either side of halftime for the north Africans who have been drawn in Group H with Belgium, Russia and South Korea at the finals in Brazil in June.
The opening goal came in stoppage time at the end of the first half. Abdelmoumene Djabou surged down the left and his centre was headed in by Soudani.
Djabou also set up Taider's header 11 minutes into the second half.
Dominant Ghana had only themselves to blame for a 1-0 defeat at Montenegro after they conceded a first-minute penalty which striker Dejan Damjanovic coolly converted to settle a drab friendly.
The Ghanaians, in World Cup Group G alongside Germany, the United States and Portugal, were caught napping as Montenegro midfielder Branko Boskovic fed Filip Kasalica from the kick-off and the forward was fouled by centre back David Addy.
Damjanovic sent keeper Adam Kwarasey the wrong way to delight the home fans but they had little to cheer about for the rest of the match as Ghana took control and wasted several good chances.
Kevin Prince Boateng missed two late chances to draw level for Ghana as Montenegro centre back Stefan Savic cleared his shot off the line before Bozovic parried a stinging long-range effort by the midfielder.
Park Chu-young boosted his chances of making South Korea's World Cup squad by scoring in a comfortable 2-0 win over a disappointing Greece.
The 28-year-old former captain, who had not represented his country since February 2013, smashed home a clinical volley after 18 minutes.
Greece, who laboured for long spells, failed to capitalise on a spell of first-half pressure which saw them hit the woodwork three times and Fernando Santos's team were punished when Son Heung-Min made it 2-0 after 55 minutes.
And finally, they were not allowed to sing their national anthem nor to wear national symbols and the match ended in a muddy 0-0 stalemate but for Kosovo the friendly international against Haiti was hailed as a huge success.
Albert Bunjaki's men were left splattered with mud after playing through rain but that was the least of their concerns as the match in the ethnically-divided town of Mitrovica signified that Kosovo was finally making inroads in its long struggle to play international matches.
More than 17,000 soccer fans attended the game - each carrying a small Kosovo flag provided by the organisers - eager to see players of Kosovo origin such as Manchester United winger Adnan Januzaj, Bayern Munich's Xherdan Shaqiri and Napoli's Valon Behrami in action.
Unfortunately for the spectators, none of those three took the field but the majority of the players who did line up are part of a generation of Kosovars whose families fled poverty and repression in the 1990s.
- Sports & Recreation
- Ivory Coast